| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/2/1989 | RYK | Ballard | Promoted to active roster | | | Before |
| 4/2/1989 | RYK | Hernandez,M | Demoted to reserve roster | | | Before |
| 4/3/1989 | BAR | Olerud | Demoted to reserve roster | | | Before |
| 4/3/1989 | BAR | Reuschel | Promoted to active roster | | | Before |
| 4/3/1989 | NEE | Myers | Promoted to active roster | | | Before |
| 4/3/1989 | NEE | Olson | Demoted to reserve roster | | | Before |
| 4/3/1989 | RYK | Alvarez | Demoted to reserve roster | | | Before |
| 4/3/1989 | RYK | Grant | Promoted to active roster | | | Before |
| 4/3/1989 | RYK | Lovelace | Demoted to reserve roster | | | Before |
| 4/3/1989 | RYK | Mahler | Promoted to active roster | | | Before |
| 4/5/1989 | RYK | Blankenship | Demoted to reserve roster | | | Before |
| 4/5/1989 | RYK | Harnisch | Promoted to active roster | | | Before |
| 4/6/1989 | MAR | Butler | Placed on Injured List | | 4/3/1989 | Before |
| 4/6/1989 | MAR | Medina | Promoted to active roster | | | Before |
| 4/8/1989 | CEN | Schofield | Placed on Injured List | | 4/7/1989 | Before |
| 4/8/1989 | CEN | Sharperson | Promoted to active roster | | | Before |
| 4/8/1989 | NEE | Reimer | Demoted to reserve roster | | | Before |
| 4/8/1989 | NEE | Woodson | Promoted to active roster | | | Before |
| 4/9/1989 | BAR | Anderson | Placed on Injured List | | 4/7/1989 | Before |
| 4/9/1989 | BAR | Coleman | Promoted to active roster | | | Before |
| 4/9/1989 | CIN | Myers | Placed on Injured List | | 4/8/1989 | Before |
| 4/9/1989 | CIN | Righetti | Promoted to active roster | | | Before |
| 4/9/1989 | RYK | Beatty | Demoted to reserve roster | | | Before |
| 4/9/1989 | RYK | Davis | Promoted to active roster | | | Before |
| 4/10/1989 | THE | Hulett | Promoted to active roster | | | Before |
| 4/10/1989 | THE | McClure | Demoted to reserve roster | | | Before |
| 4/11/1989 | RYK | Corbett | Demoted to reserve roster | | | Before |
| 4/11/1989 | RYK | Jackson | Promoted to active roster | | | Before |
| 4/12/1989 | CTW | Munoz | Demoted to reserve roster | | | Before |
| 4/12/1989 | NEE | Hale | Promoted to active roster | | | Before |
| 4/12/1989 | NEE | Woodson | Demoted to reserve roster | | | Before |
| 4/13/1989 | BMB | Bolton | Promoted to active roster | | | Before |
| 4/13/1989 | BMB | Edwards | Demoted to reserve roster | | | Before |
| 4/13/1989 | BMB | Freeman | Promoted to active roster | | | Before |
| 4/13/1989 | BMB | Gleaton | Placed on Injured List | | 4/12/1989 | Before |
| 4/13/1989 | BMB | Maddux | Placed on Injured List | | 4/11/1989 | Before |
| 4/13/1989 | BMB | Ontiveros | Promoted to active roster | | | Before |
| 4/13/1989 | CTW | Fetters | Promoted to active roster | | | Before |
| 4/13/1989 | NEE | Lindeman | Promoted to active roster | | | Before |
| 4/13/1989 | NEE | Palmer | Demoted to reserve roster | | | Before |
| 4/14/1989 | BAR | O'Brien | Promoted to active roster | | | Before |
| 4/14/1989 | BAR | Schilling | Demoted to reserve roster | | | Before |
| 4/14/1989 | CIN | Newman | Promoted to active roster | | | Before |
| 4/14/1989 | CIN | Ray | Placed on Injured List | | 4/13/1989 | Before |
| 4/14/1989 | TEW | Drabek | Placed on Injured List | | 4/13/1989 | Before |
| 4/14/1989 | TEW | Hernandez | Promoted to active roster | | | Before |
| 4/15/1989 | BMB | Freeman | Demoted to reserve roster | | | Before |
| 4/15/1989 | BMB | Gott | Promoted to active roster | | | Before |
| 4/16/1989 | EVN | Davidson | Promoted to active roster | | | Before |
| 4/16/1989 | EVN | Pettis | Placed on Injured List | | 4/14/1989 | Before |
| 4/16/1989 | NFG | Melvin | Promoted to active roster | | | Before |
| 4/16/1989 | NFG | O'Brien | Demoted to reserve roster | | | Before |
| 4/17/1989 | CIN | Benes | Demoted to reserve roster | | | Before |
| 4/17/1989 | CIN | Gross | Promoted to active roster | | | Before |
| 4/17/1989 | CTW | Bergman | Promoted to active roster | | | Before |
| 4/17/1989 | CTW | Walker | Demoted to reserve roster | | | Before |
| 4/18/1989 | GBP | Boyd | Promoted to active roster | | | Before |
| 4/18/1989 | GBP | Tudor | Demoted to reserve roster | | | Before |
| 4/18/1989 | MAR | Butler | Activated from Injured List | | | Before |
| 4/18/1989 | MAR | Medina | Demoted to reserve roster | | | Before |
| 4/18/1989 | SUN | Blowers | Demoted to reserve roster | | | Before |
| 4/18/1989 | SUN | Romero | Promoted to active roster | | | Before |
| 4/19/1989 | FER | Perez | Demoted to reserve roster | | | Before |
| 4/19/1989 | FER | Smith,Z | Promoted to active roster | | | Before |
| 4/20/1989 | CTW | Fetters | Demoted to reserve roster | | | Before |
| 4/20/1989 | CTW | Wilson | Promoted to active roster | | | Before |
| 4/21/1989 | FER | Geren | Placed on Injured List | | 4/20/1989 | Before |
| 4/21/1989 | FER | Trevino | Promoted to active roster | | | Before |
| 4/21/1989 | GBP | Felix | Promoted to active roster | | | Before |
| 4/21/1989 | GBP | Morris | Demoted to reserve roster | | | Before |
| 4/22/1989 | BMB | Gott | Demoted to reserve roster | | | Before |
| 4/22/1989 | BMB | Mason | Promoted to active roster | | | Before |
| 4/22/1989 | CEN | Schofield | Activated from Injured List | | | Before |
| 4/22/1989 | CEN | Sharperson | Demoted to reserve roster | | | Before |
| 4/22/1989 | CIN | Benes | Promoted to active roster | | | Before |
| 4/22/1989 | CIN | Fernandez | Demoted to reserve roster | | | Before |
| 4/25/1989 | BMB | Gossage | Promoted to active roster | | | Before |
| 4/25/1989 | BMB | Mason | Demoted to reserve roster | | | Before |
| 4/25/1989 | CIN | Fernandez | Promoted to active roster | | | Before |
| 4/25/1989 | CIN | Gross | Demoted to reserve roster | | | Before |
| 4/25/1989 | CIN | Myers | Activated from Injured List | | | Before |
| 4/25/1989 | CIN | Righetti | Demoted to reserve roster | | | Before |
| 4/26/1989 | SUN | Clark,D | Promoted to active roster | | | Before |
| 4/26/1989 | SUN | Shipley | Demoted to reserve roster | | | Before |
| 4/27/1989 | BAR | Anderson | Activated from Injured List | | | Before |
| 4/27/1989 | BAR | Coleman | Demoted to reserve roster | | | Before |
| 4/27/1989 | NEE | Myers | Demoted to reserve roster | | | Before |
| 4/27/1989 | NEE | Petralli | Promoted to active roster | | | Before |
| 4/28/1989 | BMB | Barnes | Promoted to active roster | | | Before |
| 4/28/1989 | BMB | Bolton | Demoted to reserve roster | | | Before |
| 4/28/1989 | BMB | Maddux | Activated from Injured List | | | Before |
| 4/28/1989 | BMB | Sorrento | Demoted to reserve roster | | | Before |
| 4/28/1989 | BMB | James | Acquired via trade | FER | | After |
| 4/28/1989 | BMB | Wilson | Traded away | FER | | After |
| 4/28/1989 | FER | James | Traded away | BMB | | After |
| 4/28/1989 | FER | Wilson | Acquired via trade | BMB | | After |
| 4/29/1989 | BMB | Barnes | Demoted to reserve roster | | | Before |
| 4/29/1989 | BMB | Gleaton | Activated from Injured List | | | Before |
| 4/29/1989 | BMB | Gossage | Demoted to reserve roster | | | Before |
| 4/29/1989 | BMB | James | Demoted to reserve roster | | | Before |
| 4/29/1989 | BMB | Schroeder | Promoted to active roster | | | Before |
| 4/29/1989 | FER | Cangelosi | Demoted to reserve roster | | | Before |
| 4/29/1989 | FER | Clary | Demoted to reserve roster | | | Before |
| 4/29/1989 | FER | Finley | Promoted to active roster | | | Before |
| 4/29/1989 | FER | Gordon | Demoted to reserve roster | | | Before |
| 4/29/1989 | FER | Greene | Promoted to active roster | | | Before |
| 4/29/1989 | FER | Perez | Promoted to active roster | | | Before |
| 4/29/1989 | FER | Plesac | Demoted to reserve roster | | | Before |
| 4/29/1989 | FER | Wilson | Demoted to reserve roster | | | Before |
| 4/29/1989 | FER | Witt | Promoted to active roster | | | Before |
| 5/1/1989 | TEW | Drabek | Activated from Injured List | | | Before |
| 5/1/1989 | TEW | Reed | Demoted to reserve roster | | | Before |
| 5/2/1989 | BAR | Aguilera | Placed on Injured List | | 4/30/1989 | Before |
| 5/2/1989 | BAR | Gardner | Promoted to active roster | | | Before |
| 5/2/1989 | FHK | Burks | Placed on Injured List | | 5/1/1989 | Before |
| 5/2/1989 | FHK | Grissom | Promoted to active roster | | | Before |
| 5/3/1989 | BMB | James | Promoted to active roster | | | Before |
| 5/3/1989 | BMB | Schroeder | Demoted to reserve roster | | | Before |
| 5/4/1989 | BAR | King | Promoted to active roster | | | Before |
| 5/4/1989 | BAR | Wells | Demoted to reserve roster | | | Before |
| 5/4/1989 | SUN | Macfarlane | Demoted to reserve roster | | | Before |
| 5/4/1989 | SUN | Reed | Promoted to active roster | | | Before |
| 5/5/1989 | CIN | Boddicker | Placed on Injured List | | 5/4/1989 | Before |
| 5/5/1989 | CIN | Gross | Promoted to active roster | | | Before |
| 5/8/1989 | MAR | McCullers | Placed on Injured List | | 5/7/1989 | Before |
| 5/8/1989 | MAR | Tibbs | Promoted to active roster | | | Before |
| 5/11/1989 | MAR | Lombardi | Promoted to active roster | | | Before |
| 5/11/1989 | MAR | Surhoff | Placed on Injured List | | 5/10/1989 | Before |
| 5/12/1989 | BAR | Moyer | Placed on Injured List | | 5/9/1989 | Before |
| 5/12/1989 | BAR | Wells | Promoted to active roster | | | Before |
| 5/13/1989 | CIN | Lee | Demoted to reserve roster | | | Before |
| 5/13/1989 | CIN | Ray | Activated from Injured List | | | Before |
| 5/13/1989 | NFG | Carter | Demoted to reserve roster | | | Before |
| 5/13/1989 | NFG | Girardi | Promoted to active roster | | | Before |
| 5/13/1989 | NFG | Guthrie | Demoted to reserve roster | | | Before |
| 5/13/1989 | NFG | Swift | Promoted to active roster | | | Before |
| 5/14/1989 | BMB | Gleaton | Demoted to reserve roster | | | Before |
| 5/14/1989 | BMB | Gossage | Promoted to active roster | | | Before |
| 5/14/1989 | NEE | Martinez,De | Placed on Injured List | | 5/13/1989 | Before |
| 5/14/1989 | NEE | McDonald | Promoted to active roster | | | Before |
| 5/14/1989 | TEW | Anthony | Promoted to active roster | | | Before |
| 5/14/1989 | TEW | Davis | Placed on Injured List | | 5/13/1989 | Before |
| 5/15/1989 | RYK | Akerfelds | Demoted to reserve roster | | | Before |
| 5/15/1989 | RYK | Booker | Promoted to active roster | | | Before |
| 5/16/1989 | CTW | Oliveras | Promoted to active roster | | | Before |
| 5/16/1989 | CTW | Tapani | Demoted to reserve roster | | | Before |
| 5/17/1989 | BAR | Aguilera | Activated from Injured List | | | Before |
| 5/17/1989 | BAR | Nunez | Demoted to reserve roster | | | Before |
| 5/17/1989 | CTW | Coolbaugh | Promoted to active roster | | | Before |
| 5/17/1989 | CTW | Robinson | Demoted to reserve roster | | | Before |
| 5/17/1989 | CTW | Robinson | Promoted to active roster | | | Before |
| 5/17/1989 | CTW | Varsho | Demoted to reserve roster | | | Before |
| 5/17/1989 | DLM | Tanana | Demoted to reserve roster | | | Before |
| 5/17/1989 | DLM | Tanana | Promoted to active roster | | | Before |
| 5/17/1989 | EVN | Bair | Demoted to reserve roster | | | Before |
| 5/17/1989 | EVN | Camacho | Promoted to active roster | | | Before |
| 5/17/1989 | EVN | Davidson | Demoted to reserve roster | | | Before |
| 5/17/1989 | EVN | Pettis | Activated from Injured List | | | Before |
| 5/17/1989 | FHK | Burks | Activated from Injured List | | | Before |
| 5/17/1989 | FHK | Grissom | Demoted to reserve roster | | | Before |
| 5/17/1989 | FHK | Jones | Placed on Injured List | | 5/16/1989 | Before |
| 5/17/1989 | FHK | Machado | Promoted to active roster | | | Before |
| 5/18/1989 | MAR | Engle | Acquired via trade | RYK | | After |
| 5/18/1989 | RYK | Engle | Traded away | MAR | | After |
| 5/19/1989 | CEN | Aquino | Promoted to active roster | | | Before |
| 5/19/1989 | CEN | Crawford | Promoted to active roster | | | Before |
| 5/19/1989 | CEN | Fermin | Promoted to active roster | | | Before |
| 5/19/1989 | CEN | Reardon | Demoted to reserve roster | | | Before |
| 5/19/1989 | CEN | Schofield | Placed on Injured List | | 5/18/1989 | Before |
| 5/19/1989 | CEN | Swindell | Placed on Injured List | | 5/17/1989 | Before |
| 5/19/1989 | CTW | Castillo | Demoted to reserve roster | | | Before |
| 5/19/1989 | CTW | Robinson | Promoted to active roster | | | Before |
| 5/19/1989 | FER | Appier | Promoted to active roster | | | Before |
| 5/19/1989 | FER | Greene | Demoted to reserve roster | | | Before |
| 5/19/1989 | FHK | Jeltz | Promoted to active roster | | | Before |
| 5/19/1989 | FHK | Sabo | Placed on Injured List | | 5/17/1989 | Before |
| 5/19/1989 | GBP | Farr | Demoted to reserve roster | | | Before |
| 5/19/1989 | GBP | Jones | Promoted to active roster | | | Before |
| 5/19/1989 | MAR | Engle | Demoted to reserve roster | | | Before |
| 5/19/1989 | SUN | Buhner | Demoted to reserve roster | | | Before |
| 5/19/1989 | SUN | Ducey | Promoted to active roster | | | Before |
| 5/20/1989 | BMB | Fraser | Placed on Injured List | | 5/18/1989 | Before |
| 5/20/1989 | BMB | Gonzalez | Demoted to reserve roster | | | Before |
| 5/20/1989 | BMB | Power | Promoted to active roster | | | Before |
| 5/20/1989 | BMB | Salas | Promoted to active roster | | | Before |
| 5/20/1989 | BMB | Vaughn | Demoted to reserve roster | | | Before |
| 5/20/1989 | BMB | Vaughn | Promoted to active roster | | | Before |
| 5/20/1989 | FER | Lyons | Traded away | MAR | | After |
| 5/20/1989 | MAR | Lyons | Acquired via trade | FER | | After |
| 5/21/1989 | BMB | Morman | Promoted to active roster | | | Before |
| 5/21/1989 | BMB | Vaughn | Demoted to reserve roster | | | Before |
| 5/23/1989 | BMB | Maddux | Placed on Injured List | | 5/21/1989 | Before |
| 5/23/1989 | BMB | Ontiveros | Demoted to reserve roster | | | Before |
| 5/23/1989 | BMB | Ruffin | Promoted to active roster | | | Before |
| 5/23/1989 | BMB | Schatzeder | Promoted to active roster | | | Before |
| 5/23/1989 | CTW | Bautista | Demoted to reserve roster | | | Before |
| 5/23/1989 | CTW | Kutcher | Promoted to active roster | | | Before |
| 5/24/1989 | CIN | Benes | Demoted to reserve roster | | | Before |
| 5/24/1989 | CIN | Boddicker | Activated from Injured List | | | Before |
| 5/24/1989 | CIN | Gross | Demoted to reserve roster | | | Before |
| 5/24/1989 | CIN | McWilliams | Promoted to active roster | | | Before |
| 5/24/1989 | MAR | Lombardi | Demoted to reserve roster | | | Before |
| 5/25/1989 | CTW | Calderon | Traded away | NFG | | After |
| 5/25/1989 | CTW | Swift | Acquired via trade | NFG | | After |
| 5/25/1989 | FER | Geren | Activated from Injured List | | | Before |
| 5/25/1989 | FER | Trevino | Demoted to reserve roster | | | Before |
| 5/25/1989 | NFG | Calderon | Acquired via trade | CTW | | After |
| 5/25/1989 | NFG | Swift | Traded away | CTW | | After |
| 5/26/1989 | BAR | Black | Placed on Injured List | | 5/24/1989 | Before |
| 5/26/1989 | BAR | Moyer | Activated from Injured List | | | Before |
| 5/26/1989 | CTW | Lynn | Promoted to active roster | | | Before |
| 5/26/1989 | CTW | Robinson | Demoted to reserve roster | | | Before |
| 5/26/1989 | EVN | Browning | Demoted to reserve roster | | | Before |
| 5/26/1989 | EVN | Krukow | Promoted to active roster | | | Before |
| 5/26/1989 | NEE | Carpenter | Promoted to active roster | | | Before |
| 5/26/1989 | NEE | McDonald | Demoted to reserve roster | | | Before |
| 5/27/1989 | FER | Carreon | Promoted to active roster | | | Before |
| 5/27/1989 | FER | Clary | Promoted to active roster | | | Before |
| 5/27/1989 | FER | Dopson | Demoted to reserve roster | | | Before |
| 5/27/1989 | FER | Gonzalez | Demoted to reserve roster | | | Before |
| 5/27/1989 | FER | Gordon | Promoted to active roster | | | Before |
| 5/27/1989 | FER | Hall | Demoted to reserve roster | | | Before |
| 5/27/1989 | FER | Knudson | Demoted to reserve roster | | | Before |
| 5/27/1989 | FER | Plesac | Promoted to active roster | | | Before |
| 5/27/1989 | NEE | Lindeman | Demoted to reserve roster | | | Before |
| 5/27/1989 | NEE | Martinez | Promoted to active roster | | | Before |
| 5/29/1989 | MAR | McCullers | Activated from Injured List | | | Before |
| 5/29/1989 | MAR | Tibbs | Demoted to reserve roster | | | Before |
| 5/30/1989 | BBG | Eave | Demoted to reserve roster | | | Before |
| 6/1/1989 | FHK | Jones | Activated from Injured List | | | Before |
| 6/1/1989 | FHK | Machado | Demoted to reserve roster | | | Before |
| 6/1/1989 | NEE | Carpenter | Demoted to reserve roster | | | Before |
| 6/1/1989 | NEE | Martinez,De | Activated from Injured List | | | Before |
| 6/2/1989 | EVN | Browning | Promoted to active roster | | | Before |
| 6/2/1989 | EVN | Smiley | Placed on Injured List | | 6/1/1989 | Before |
| 6/4/1989 | TEW | Alomar,S | Promoted to active roster | | | Before |
| 6/4/1989 | TEW | Canseco | Demoted to reserve roster | | | Before |
| 6/6/1989 | BBG | Lefferts | Promoted to active roster | | | Before |
| 6/6/1989 | EVN | Bair | Promoted to active roster | | | Before |
| 6/6/1989 | EVN | Camacho | Demoted to reserve roster | | | Before |
| 6/6/1989 | EVN | Hough | Promoted to active roster | | | Before |
| 6/6/1989 | EVN | Magrane | Placed on Injured List | | 6/5/1989 | Before |
| 6/6/1989 | GBP | Boyd | Demoted to reserve roster | | | Before |
| 6/6/1989 | GBP | Meyer | Promoted to active roster | | | Before |
| 6/6/1989 | MAR | Lombardi | Promoted to active roster | | | Before |
| 6/6/1989 | MAR | Patterson | Demoted to reserve roster | | | Before |
| 6/6/1989 | SUN | Bell | Demoted to reserve roster | | | Before |
| 6/6/1989 | SUN | Brantley | Promoted to active roster | | | Before |
| 6/6/1989 | SUN | Martinez | Promoted to active roster | | | Before |
| 6/6/1989 | SUN | Navarro | Demoted to reserve roster | | | Before |
| 6/8/1989 | BMB | Maddux | Activated from Injured List | | | Before |
| 6/8/1989 | BMB | Ruffin | Demoted to reserve roster | | | Before |
| 6/8/1989 | NFG | Armstrong | Promoted to active roster | | | Before |
| 6/8/1989 | NFG | Young,M | Demoted to reserve roster | | | Before |
| 6/10/1989 | BAR | Coleman | Promoted to active roster | | | Before |
| 6/10/1989 | BAR | Webster | Demoted to reserve roster | | | Before |
| 6/10/1989 | CEN | Fermin | Demoted to reserve roster | | | Before |
| 6/10/1989 | CEN | Jones | Demoted to reserve roster | | | Before |
| 6/10/1989 | CEN | Puhl | Promoted to active roster | | | Before |
| 6/10/1989 | CEN | Schofield | Activated from Injured List | | | Before |
| 6/10/1989 | FER | Appier | Demoted to reserve roster | | | Before |
| 6/10/1989 | FER | Knudson | Promoted to active roster | | | Before |
| 6/10/1989 | GBP | Crews | Promoted to active roster | | | Before |
| 6/10/1989 | GBP | Jones | Demoted to reserve roster | | | Before |
| 6/10/1989 | GBP | Lyons | Promoted to active roster | | | Before |
| 6/10/1989 | GBP | Rijo | Demoted to reserve roster | | | Before |
| 6/10/1989 | SUN | Innis | Demoted to reserve roster | | | Before |
| 6/10/1989 | SUN | Leiter | Promoted to active roster | | | Before |
| 6/10/1989 | SUN | Reed | Placed on Injured List | | 6/6/1989 | Before |
| 6/10/1989 | SUN | Webster | Promoted to active roster | | | Before |
| 6/11/1989 | FHK | Downs | Promoted to active roster | | | Before |
| 6/11/1989 | FHK | Gooden | Demoted to reserve roster | | | Before |
| 6/11/1989 | NEE | Belinda | Promoted to active roster | | | Before |
| 6/11/1989 | NEE | Hale | Demoted to reserve roster | | | Before |
| 6/11/1989 | NEE | Snyder | Promoted to active roster | | | Before |
| 6/11/1989 | NEE | Wilson | Demoted to reserve roster | | | Before |
| 6/12/1989 | RYK | Belle | Demoted to reserve roster | | | Before |
| 6/13/1989 | BMB | Fraser | Activated from Injured List | | | Before |
| 6/13/1989 | BMB | Johnson | Placed on Injured List | | 6/12/1989 | Before |
| 6/13/1989 | TEW | Davis | Activated from Injured List | | | Before |
| 6/13/1989 | TEW | Johnson | Demoted to reserve roster | | | Before |
| 6/14/1989 | BAR | Black | Activated from Injured List | | | Before |
| 6/14/1989 | BAR | Gardner | Demoted to reserve roster | | | Before |
| 6/14/1989 | BAR | Ventura | Promoted to active roster | | | Before |
| 6/14/1989 | BAR | Worthington | Demoted to reserve roster | | | Before |
| 6/14/1989 | EVN | Aldrich | Promoted to active roster | | | Before |
| 6/14/1989 | EVN | Krukow | Demoted to reserve roster | | | Before |
| 6/14/1989 | RYK | Maldonado | Promoted to active roster | | | Before |
| 6/16/1989 | RYK | Sosa | Demoted to reserve roster | | | Before |
| 6/16/1989 | RYK | Wynne | Promoted to active roster | | | Before |
| 6/17/1989 | FER | Clary | Demoted to reserve roster | | | Before |
| 6/17/1989 | FER | Dopson | Promoted to active roster | | | Before |
| 6/17/1989 | NFG | Richie | Signed | | | Before |
| 6/18/1989 | EVN | Hough | Demoted to reserve roster | | | Before |
| 6/18/1989 | EVN | Smiley | Activated from Injured List | | | Before |
| 6/18/1989 | FHK | Jeltz | Demoted to reserve roster | | | Before |
| 6/18/1989 | FHK | Sabo | Activated from Injured List | | | Before |
| 6/20/1989 | CIN | Daniels | Placed on Injured List | | 6/14/1989 | Before |
| 6/20/1989 | CIN | Moses | Promoted to active roster | | | Before |
| 6/20/1989 | DLM | Cotto | Promoted to active roster | | | Before |
| 6/20/1989 | DLM | McGee | Demoted to reserve roster | | | Before |
| 6/21/1989 | CTW | Oliveras | Demoted to reserve roster | | | Before |
| 6/21/1989 | CTW | Robinson | Promoted to active roster | | | Before |
| 6/21/1989 | GBP | Arnsberg | Demoted to reserve roster | | | Before |
| 6/21/1989 | GBP | Frey | Demoted to reserve roster | | | Before |
| 6/21/1989 | GBP | Hawkins | Promoted to active roster | | | Before |
| 6/21/1989 | GBP | McGaffigan | Promoted to active roster | | | Before |
| 6/21/1989 | GBP | Meyer | Demoted to reserve roster | | | Before |
| 6/21/1989 | GBP | Rawley | Promoted to active roster | | | Before |
| 6/21/1989 | SUN | Bilardello | Promoted to active roster | | | Before |
| 6/21/1989 | SUN | Webster | Demoted to reserve roster | | | Before |
| 6/22/1989 | BAR | Wells | Demoted to reserve roster | | | Before |
| 6/24/1989 | EVN | Trammell | Placed on Injured List | | 6/23/1989 | Before |
| 6/24/1989 | EVN | Zuvella | Promoted to active roster | | | Before |
| 6/25/1989 | BAR | Comstock | Promoted to active roster | | | Before |
| 6/25/1989 | BMB | Quirk | Demoted to reserve roster | | | Before |
| 6/25/1989 | BMB | Schroeder | Promoted to active roster | | | Before |
| 6/27/1989 | MAR | Lombardi | Demoted to reserve roster | | | Before |
| 6/27/1989 | MAR | Medina | Promoted to active roster | | | Before |
| 6/27/1989 | MAR | Parent | Demoted to reserve roster | | | Before |
| 6/27/1989 | MAR | Surhoff | Activated from Injured List | | | Before |
| 6/27/1989 | TEW | Alomar,S | Demoted to reserve roster | | | Before |
| 6/27/1989 | TEW | Hernandez | Demoted to reserve roster | | | Before |
| 6/27/1989 | TEW | Reed | Promoted to active roster | | | Before |
| 6/27/1989 | TEW | Schmidt | Promoted to active roster | | | Before |
| 6/30/1989 | BMB | James | Placed on Injured List | | 6/26/1989 | Before |
| 6/30/1989 | BMB | Johnson | Activated from Injured List | | | Before |
| 7/1/1989 | BBG | Hickey | Demoted to reserve roster | | | Before |
| 7/1/1989 | NEE | Hanson | Demoted to reserve roster | | | Before |
| 7/3/1989 | BAR | Ventura | Demoted to reserve roster | | | Before |
| 7/3/1989 | BAR | Worthington | Promoted to active roster | | | Before |
| 7/3/1989 | BMB | Gonzalez | Promoted to active roster | | | Before |
| 7/3/1989 | BMB | Hibbard | Demoted to reserve roster | | | Before |
| 7/3/1989 | CEN | Armstrong | Acquired via trade | NFG | | After |
| 7/3/1989 | CEN | Bankhead | Traded away | CIN | | After |
| 7/3/1989 | CEN | Boddicker | Acquired via trade | CIN | | After |
| 7/3/1989 | CEN | Burns | Traded away | NFG | | After |
| 7/3/1989 | CEN | Moore | Traded away | NFG | | After |
| 7/3/1989 | CEN | Young,M | Acquired via trade | NFG | | After |
| 7/3/1989 | CIN | Bankhead | Demoted to reserve roster | | | Before |
| 7/3/1989 | CIN | Gross | Promoted to active roster | | | Before |
| 7/3/1989 | CIN | Bankhead | Acquired via trade | CEN | | After |
| 7/3/1989 | CIN | Boddicker | Traded away | CEN | | After |
| 7/3/1989 | EVN | Aldrich | Demoted to reserve roster | | | Before |
| 7/3/1989 | EVN | Krukow | Promoted to active roster | | | Before |
| 7/3/1989 | EVN | Magrane | Activated from Injured List | | | Before |
| 7/3/1989 | EVN | Smith,B | Placed on Injured List | | 7/1/1989 | Before |
| 7/3/1989 | NFG | Bielecki | Demoted to reserve roster | | | Before |
| 7/3/1989 | NFG | Bream | Demoted to reserve roster | | | Before |
| 7/3/1989 | NFG | Henderson,D | Demoted to reserve roster | | | Before |
| 7/3/1989 | NFG | Komminsk | Promoted to active roster | | | Before |
| 7/3/1989 | NFG | Lemke | Demoted to reserve roster | | | Before |
| 7/3/1989 | NFG | McDowell | Promoted to active roster | | | Before |
| 7/3/1989 | NFG | Melvin | Demoted to reserve roster | | | Before |
| 7/3/1989 | NFG | O'Brien | Promoted to active roster | | | Before |
| 7/3/1989 | NFG | Parrett | Demoted to reserve roster | | | Before |
| 7/3/1989 | NFG | Richie | Promoted to active roster | | | Before |
| 7/3/1989 | NFG | Thompson | Promoted to active roster | | | Before |
| 7/3/1989 | NFG | Armstrong | Traded away | CEN | | After |
| 7/3/1989 | NFG | Burns | Acquired via trade | CEN | | After |
| 7/3/1989 | NFG | Moore | Acquired via trade | CEN | | After |
| 7/3/1989 | NFG | Young,M | Traded away | CEN | | After |
| 7/4/1989 | GBP | Nunez | Demoted to reserve roster | | | Before |
| 7/4/1989 | NEE | Jeffcoat | Promoted to active roster | | | Before |
| 7/5/1989 | GBP | Alexander | Promoted to active roster | | | Before |
| 7/6/1989 | CEN | Puhl | Traded away | TEW | | After |
| 7/6/1989 | CIN | Pena | Demoted to reserve roster | | | Before |
| 7/6/1989 | CIN | Seanez | Promoted to active roster | | | Before |
| 7/6/1989 | FER | Snyder | Acquired via trade | NEE | | After |
| 7/6/1989 | NEE | Snyder | Traded away | FER | | After |
| 7/6/1989 | TEW | Puhl | Acquired via trade | CEN | | After |
| 7/7/1989 | CEN | Armstrong | Demoted to reserve roster | | | Before |
| 7/7/1989 | CEN | DeJesus | Promoted to active roster | | | Before |
| 7/7/1989 | CEN | Higuera | Demoted to reserve roster | | | Before |
| 7/7/1989 | CEN | Nelson | Demoted to reserve roster | | | Before |
| 7/7/1989 | CEN | Reardon | Promoted to active roster | | | Before |
| 7/7/1989 | CEN | Ripken,B | Promoted to active roster | | | Before |
| 7/7/1989 | CEN | Swindell | Activated from Injured List | | | Before |
| 7/7/1989 | DLM | Gallego | Demoted to reserve roster | | | Before |
| 7/7/1989 | DLM | Liriano | Promoted to active roster | | | Before |
| 7/7/1989 | DLM | McElroy | Promoted to active roster | | | Before |
| 7/7/1989 | DLM | Wegman | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Appier | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Cangelosi | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Castillo | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Dopson | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Espinoza | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Finley | Placed on Injured List | | 7/6/1989 | Before |
| 7/7/1989 | FER | Geren | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Gonzalez | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Hall | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Heaton | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Hill | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Huson | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Knudson | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Manrique | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | McClendon | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Pecota | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Plesac | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Quinones | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Snyder | Demoted to reserve roster | | | Before |
| 7/7/1989 | FER | Wilson | Promoted to active roster | | | Before |
| 7/7/1989 | FER | Witt | Placed on Injured List | | 7/6/1989 | Before |
| 7/7/1989 | FER | DuBois | Traded away | NFG | | After |
| 7/7/1989 | FER | Henderson,D | Acquired via trade | NFG | | After |
| 7/7/1989 | FER | McClendon | Traded away | NFG | | After |
| 7/7/1989 | FER | Plesac | Traded away | NFG | | After |
| 7/7/1989 | FER | Stanton | Traded away | NFG | | After |
| 7/7/1989 | FER | Whitehurst | Acquired via trade | NFG | | After |
| 7/7/1989 | NEE | Nichols | Demoted to reserve roster | | | Before |
| 7/7/1989 | NEE | Otto | Promoted to active roster | | | Before |
| 7/7/1989 | NFG | DuBois | Acquired via trade | FER | | After |
| 7/7/1989 | NFG | Henderson,D | Traded away | FER | | After |
| 7/7/1989 | NFG | McClendon | Acquired via trade | FER | | After |
| 7/7/1989 | NFG | Plesac | Acquired via trade | FER | | After |
| 7/7/1989 | NFG | Stanton | Acquired via trade | FER | | After |
| 7/7/1989 | NFG | Whitehurst | Traded away | FER | | After |
| 7/7/1989 | TEW | Anthony | Demoted to reserve roster | | | Before |
| 7/7/1989 | TEW | Puhl | Demoted to reserve roster | | | Before |
| 7/7/1989 | TEW | Puhl | Promoted to active roster | | | Before |
| 7/8/1989 | BMB | Gonzalez | Demoted to reserve roster | | | Before |
| 7/8/1989 | BMB | Hill | Demoted to reserve roster | | | Before |
| 7/8/1989 | BMB | Ruffin | Promoted to active roster | | | Before |
| 7/8/1989 | BMB | Vaughn | Promoted to active roster | | | Before |
| 7/8/1989 | FER | Pecota | Demoted to reserve roster | | | Before |
| 7/8/1989 | FER | Quinones | Demoted to reserve roster | | | Before |
| 7/8/1989 | FER | Snyder | Promoted to active roster | | | Before |
| 7/8/1989 | FER | Whitehurst | Demoted to reserve roster | | | Before |
| 7/8/1989 | NEE | Teufel | Promoted to active roster | | | Before |
| 7/8/1989 | NFG | DuBois | Demoted to reserve roster | | | Before |
| 7/8/1989 | NFG | O'Brien | Demoted to reserve roster | | | Before |
| 7/8/1989 | NFG | Plesac | Demoted to reserve roster | | | Before |
| 7/8/1989 | NFG | Stanton | Demoted to reserve roster | | | Before |
| 7/12/1989 | BAR | Carreon | Traded away | FER | | After |
| 7/12/1989 | BAR | Carreon | Acquired via trade | FER | | After |
| 7/12/1989 | BAR | Castillo | Acquired via trade | FER | | After |
| 7/12/1989 | BAR | Clary | Acquired via trade | FER | | After |
| 7/12/1989 | BAR | Espinoza | Acquired via trade | FER | | After |
| 7/12/1989 | BAR | Knudson | Acquired via trade | FER | | After |
| 7/12/1989 | BAR | Leiper | Traded away | FER | | After |
| 7/12/1989 | CIN | Bankhead | Promoted to active roster | | | Before |
| 7/12/1989 | CIN | Benes | Promoted to active roster | | | Before |
| 7/12/1989 | CIN | Gross | Demoted to reserve roster | | | Before |
| 7/12/1989 | CIN | McWilliams | Demoted to reserve roster | | | Before |
| 7/12/1989 | CTW | LaPoint | Promoted to active roster | | | Before |
| 7/12/1989 | CTW | Ritz | Demoted to reserve roster | | | Before |
| 7/12/1989 | FER | Carreon | Traded away | BAR | | After |
| 7/12/1989 | FER | Carreon | Acquired via trade | BAR | | After |
| 7/12/1989 | FER | Castillo | Traded away | BAR | | After |
| 7/12/1989 | FER | Clary | Traded away | BAR | | After |
| 7/12/1989 | FER | Espinoza | Traded away | BAR | | After |
| 7/12/1989 | FER | Knudson | Traded away | BAR | | After |
| 7/12/1989 | FER | Leiper | Acquired via trade | BAR | | After |
| 7/12/1989 | RYK | Bannister | Promoted to active roster | | | Before |
| 7/12/1989 | RYK | Price | Demoted to reserve roster | | | Before |
| 7/13/1989 | BAR | Castillo | Demoted to reserve roster | | | Before |
| 7/13/1989 | BAR | Clary | Demoted to reserve roster | | | Before |
| 7/13/1989 | BAR | Espinoza | Demoted to reserve roster | | | Before |
| 7/13/1989 | BAR | Knudson | Demoted to reserve roster | | | Before |
| 7/13/1989 | BMB | James | Activated from Injured List | | | Before |
| 7/13/1989 | BMB | Vaughn | Demoted to reserve roster | | | Before |
| 7/13/1989 | FER | Leiper | Demoted to reserve roster | | | Before |
| 7/13/1989 | FER | Geren | Traded away | TEW | | After |
| 7/13/1989 | FER | Manrique | Traded away | TEW | | After |
| 7/13/1989 | TEW | Geren | Acquired via trade | FER | | After |
| 7/13/1989 | TEW | Manrique | Acquired via trade | FER | | After |
| 7/14/1989 | TEW | Geren | Demoted to reserve roster | | | Before |
| 7/14/1989 | TEW | Manrique | Demoted to reserve roster | | | Before |
| 7/14/1989 | THE | Corsi | Demoted to reserve roster | | | Before |
| 7/14/1989 | THE | Hulett | Demoted to reserve roster | | | Before |
| 7/14/1989 | THE | Kipper | Promoted to active roster | | | Before |
| 7/14/1989 | THE | LaValliere | Demoted to reserve roster | | | Before |
| 7/14/1989 | THE | McCaskill | Promoted to active roster | | | Before |
| 7/14/1989 | THE | Morgan | Demoted to reserve roster | | | Before |
| 7/14/1989 | THE | Perry | Promoted to active roster | | | Before |
| 7/14/1989 | THE | Sanders | Promoted to active roster | | | Before |
| 7/14/1989 | THE | Smith,L | Placed on Injured List | | 7/13/1989 | Before |
| 7/14/1989 | THE | Zeile | Promoted to active roster | | | Before |
| 7/15/1989 | BBG | Dyer | Promoted to active roster | | | Before |
| 7/15/1989 | CIN | Larkin | Placed on Injured List | | 7/14/1989 | Before |
| 7/15/1989 | CIN | Lee | Promoted to active roster | | | Before |
| 7/15/1989 | CTW | Ashby | Promoted to active roster | | | Before |
| 7/15/1989 | CTW | Nokes | Placed on Injured List | | 7/14/1989 | Before |
| 7/15/1989 | EVN | Trammell | Activated from Injured List | | | Before |
| 7/15/1989 | EVN | Zuvella | Demoted to reserve roster | | | Before |
| 7/15/1989 | NFG | Girardi | Demoted to reserve roster | | | Before |
| 7/15/1989 | NFG | O'Brien | Promoted to active roster | | | Before |
| 7/15/1989 | SUN | Bilardello | Demoted to reserve roster | | | Before |
| 7/15/1989 | SUN | Macfarlane | Promoted to active roster | | | Before |
| 7/15/1989 | SUN | Reed | Activated from Injured List | | | Before |
| 7/15/1989 | SUN | Stanley | Demoted to reserve roster | | | Before |
| 7/15/1989 | TEW | Geren | Promoted to active roster | | | Before |
| 7/15/1989 | TEW | Hassey | Demoted to reserve roster | | | Before |
| 7/15/1989 | TEW | Manrique | Promoted to active roster | | | Before |
| 7/15/1989 | TEW | Stillwell | Demoted to reserve roster | | | Before |
| 7/17/1989 | CIN | Seanez | Demoted to reserve roster | | | Before |
| 7/17/1989 | CIN | Veres | Promoted to active roster | | | Before |
| 7/18/1989 | DLM | Brock | Demoted to reserve roster | | | Before |
| 7/18/1989 | DLM | Jose | Promoted to active roster | | | Before |
| 7/18/1989 | DLM | Krueger | Promoted to active roster | | | Before |
| 7/18/1989 | DLM | Murphy | Promoted to active roster | | | Before |
| 7/18/1989 | DLM | O'Neill | Demoted to reserve roster | | | Before |
| 7/18/1989 | DLM | Patterson | Demoted to reserve roster | | | Before |
| 7/19/1989 | EVN | Jones | Promoted to active roster | | 7/19/1989 | Before |
| 7/19/1989 | EVN | Krukow | Demoted to reserve roster | | 7/19/1989 | Before |
| 7/19/1989 | EVN | Smith,B | Activated from Injured List | | 7/19/1989 | Before |
| 7/19/1989 | EVN | Trammell | Placed on Injured List | | 7/15/1989 | Before |
| 7/20/1989 | CEN | Stubbs | Acquired via trade | THE | | After |
| 7/20/1989 | CEN | Swindell | Traded away | THE | | After |
| 7/20/1989 | THE | Stubbs | Traded away | CEN | | After |
| 7/20/1989 | THE | Swindell | Acquired via trade | CEN | | After |
| 7/21/1989 | BAR | Boston | Demoted to reserve roster | | | Before |
| 7/21/1989 | BAR | Castillo | Promoted to active roster | | | Before |
| 7/21/1989 | BAR | Coleman | Demoted to reserve roster | | | Before |
| 7/21/1989 | BAR | Sundberg | Promoted to active roster | | | Before |
| 7/21/1989 | BAR | Wayne | Promoted to active roster | | | Before |
| 7/21/1989 | BAR | Williamson | Placed on Injured List | | 7/18/1989 | Before |
| 7/21/1989 | CEN | Armas | Demoted to reserve roster | | | Before |
| 7/21/1989 | CEN | Armstrong | Promoted to active roster | | | Before |
| 7/21/1989 | CEN | DeJesus | Demoted to reserve roster | | | Before |
| 7/21/1989 | CEN | Smith | Promoted to active roster | | | Before |
| 7/21/1989 | DLM | Heep | Traded away | MAR | | After |
| 7/21/1989 | DLM | Liriano | Traded away | MAR | | After |
| 7/21/1989 | DLM | Spiers | Acquired via trade | MAR | | After |
| 7/21/1989 | FHK | Downs | Demoted to reserve roster | | | Before |
| 7/21/1989 | FHK | Gooden | Promoted to active roster | | | Before |
| 7/21/1989 | FHK | Jeltz | Promoted to active roster | | | Before |
| 7/21/1989 | FHK | Justice | Demoted to reserve roster | | | Before |
| 7/21/1989 | FHK | Parker | Promoted to active roster | | | Before |
| 7/21/1989 | FHK | Sabo | Placed on Injured List | | 7/20/1989 | Before |
| 7/21/1989 | MAR | Heep | Acquired via trade | DLM | | After |
| 7/21/1989 | MAR | Liriano | Acquired via trade | DLM | | After |
| 7/21/1989 | MAR | Spiers | Traded away | DLM | | After |
| 7/21/1989 | NEE | Carpenter | Promoted to active roster | | | Before |
| 7/21/1989 | NEE | Jeffcoat | Demoted to reserve roster | | | Before |
| 7/21/1989 | THE | Downing | Promoted to active roster | | | Before |
| 7/21/1989 | THE | McCaskill | Demoted to reserve roster | | | Before |
| 7/22/1989 | CIN | Benes | Demoted to reserve roster | | | Before |
| 7/22/1989 | CIN | McWilliams | Promoted to active roster | | | Before |
| 7/22/1989 | CIN | Pena | Promoted to active roster | | | Before |
| 7/22/1989 | CIN | Veres | Demoted to reserve roster | | | Before |
| 7/22/1989 | FER | Gordon | Demoted to reserve roster | | | Before |
| 7/22/1989 | FER | Hall | Demoted to reserve roster | | | Before |
| 7/22/1989 | FER | Leiper | Promoted to active roster | | | Before |
| 7/22/1989 | FER | Witt | Activated from Injured List | | | Before |
| 7/22/1989 | MAR | Heep | Demoted to reserve roster | | | Before |
| 7/22/1989 | NEE | Belinda | Demoted to reserve roster | | | Before |
| 7/22/1989 | NEE | Worrell | Promoted to active roster | | | Before |
| 7/22/1989 | SUN | Ducey | Demoted to reserve roster | | | Before |
| 7/22/1989 | SUN | Rice | Promoted to active roster | | | Before |
| 7/23/1989 | BAR | Coleman | Promoted to active roster | | | Before |
| 7/23/1989 | BAR | Daugherty | Demoted to reserve roster | | | Before |
| 7/25/1989 | GBP | Andersen | Demoted to reserve roster | | | Before |
| 7/25/1989 | GBP | Espy | Promoted to active roster | | | Before |
| 7/25/1989 | GBP | LaCoss | Promoted to active roster | | | Before |
| 7/25/1989 | GBP | Riles | Demoted to reserve roster | | | Before |
| 7/26/1989 | FER | Appier | Demoted to reserve roster | | | Before |
| 7/26/1989 | FER | Trout | Promoted to active roster | | | Before |
| 7/26/1989 | RYK | Winningham | Promoted to active roster | | | Before |
| 7/26/1989 | RYK | Wynne | Placed on Injured List | | 7/24/1989 | Before |
| 7/27/1989 | BAR | Fossas | Promoted to active roster | | | Before |
| 7/27/1989 | BAR | King | Demoted to reserve roster | | | Before |
| 7/27/1989 | BAR | Knudson | Promoted to active roster | | | Before |
| 7/27/1989 | BAR | Reuschel | Demoted to reserve roster | | | Before |
| 7/27/1989 | CIN | Grimsley | Promoted to active roster | | | Before |
| 7/27/1989 | CIN | McWilliams | Demoted to reserve roster | | | Before |
| 7/27/1989 | NFG | DuBois | Promoted to active roster | | | Before |
| 7/27/1989 | NFG | Eckersley | Demoted to reserve roster | | | Before |
| 7/27/1989 | NFG | Farrell | Placed on Injured List | | 7/26/1989 | Before |
| 7/27/1989 | NFG | Stanton | Promoted to active roster | | | Before |
| 7/28/1989 | CEN | Anderson | Demoted to reserve roster | | | Before |
| 7/28/1989 | CEN | Armas | Promoted to active roster | | | Before |
| 7/28/1989 | CEN | Higuera | Promoted to active roster | | | Before |
| 7/28/1989 | CEN | Nelson | Promoted to active roster | | | Before |
| 7/28/1989 | CEN | Ripken,B | Demoted to reserve roster | | | Before |
| 7/28/1989 | CEN | Young,M | Demoted to reserve roster | | | Before |
| 7/28/1989 | NEE | Finley | Placed on Injured List | | 7/12/1989 | Before |
| 7/28/1989 | NEE | Jeffcoat | Promoted to active roster | | | Before |
| 7/28/1989 | NEE | Otto | Demoted to reserve roster | | | Before |
| 7/28/1989 | NEE | Parker | Promoted to active roster | | | Before |
| 7/28/1989 | RYK | Harnisch | Demoted to reserve roster | | | Before |
| 7/29/1989 | RYK | Terry | Promoted to active roster | | | Before |
| 7/30/1989 | BMB | Morman | Demoted to reserve roster | | | Before |
| 7/30/1989 | BMB | Vaughn | Promoted to active roster | | | Before |
| 7/31/1989 | BBG | Hall | Acquired via trade | FER | | After |
| 7/31/1989 | BMB | Backman | Acquired via trade | CIN | | After |
| 7/31/1989 | BMB | Fletcher | Acquired via trade | NFG | | After |
| 7/31/1989 | BMB | Gossage | Traded away | NFG | | After |
| 7/31/1989 | BMB | Mason | Traded away | DLM | | After |
| 7/31/1989 | BMB | Polonia | Traded away | DLM | | After |
| 7/31/1989 | BMB | Schatzeder | Traded away | FER | | After |
| 7/31/1989 | BMB | Treadway | Traded away | CIN | | After |
| 7/31/1989 | CEN | Bass | Traded away | EVN | | After |
| 7/31/1989 | CEN | Carman | Acquired via trade | EVN | | After |
| 7/31/1989 | CEN | Crawford | Traded away | EVN | | After |
| 7/31/1989 | CEN | Dayley | Acquired via trade | EVN | | After |
| 7/31/1989 | CEN | Higuera | Traded away | EVN | | After |
| 7/31/1989 | CIN | Backman | Traded away | BMB | | After |
| 7/31/1989 | CIN | Backman | Acquired via trade | CTW | | After |
| 7/31/1989 | CIN | Thompson,M | Traded away | CTW | | After |
| 7/31/1989 | CIN | Treadway | Acquired via trade | BMB | | After |
| 7/31/1989 | CTW | Backman | Traded away | CIN | | After |
| 7/31/1989 | CTW | Coles | Acquired via trade | TEW | | After |
| 7/31/1989 | CTW | Lynn | Traded away | TEW | | After |
| 7/31/1989 | CTW | McDowell | Traded away | DLM | | After |
| 7/31/1989 | CTW | Mulholland | Acquired via trade | DLM | | After |
| 7/31/1989 | CTW | Thompson,M | Acquired via trade | CIN | | After |
| 7/31/1989 | DLM | Mason | Acquired via trade | BMB | | After |
| 7/31/1989 | DLM | McDowell | Acquired via trade | CTW | | After |
| 7/31/1989 | DLM | Mulholland | Traded away | CTW | | After |
| 7/31/1989 | DLM | Polonia | Acquired via trade | BMB | | After |
| 7/31/1989 | EVN | Bass | Acquired via trade | CEN | | After |
| 7/31/1989 | EVN | Carman | Traded away | CEN | | After |
| 7/31/1989 | EVN | Crawford | Acquired via trade | CEN | | After |
| 7/31/1989 | EVN | Dayley | Traded away | CEN | | After |
| 7/31/1989 | EVN | Higuera | Acquired via trade | CEN | | After |
| 7/31/1989 | FER | Dopson | Promoted to active roster | | | Before |
| 7/31/1989 | FER | Pecota | Promoted to active roster | | | Before |
| 7/31/1989 | FER | Plunk | Demoted to reserve roster | | | Before |
| 7/31/1989 | FER | Velarde | Demoted to reserve roster | | | Before |
| 7/31/1989 | FER | Ward | Demoted to reserve roster | | | Before |
| 7/31/1989 | FER | Whitehurst | Promoted to active roster | | | Before |
| 7/31/1989 | FER | Hall | Traded away | BBG | | After |
| 7/31/1989 | FER | Schatzeder | Acquired via trade | BMB | | After |
| 7/31/1989 | NFG | Fletcher | Traded away | BMB | | After |
| 7/31/1989 | NFG | Gossage | Acquired via trade | BMB | | After |
| 7/31/1989 | TEW | Coles | Traded away | CTW | | After |
| 7/31/1989 | TEW | Lynn | Acquired via trade | CTW | | After |
| 8/1/1989 | BBG | Dyer | Demoted to reserve roster | | | Before |
| 8/1/1989 | BBG | Hall | Demoted to reserve roster | | | Before |
| 8/1/1989 | BBG | Hall | Promoted to active roster | | | Before |
| 8/1/1989 | BMB | Anderson | Demoted to reserve roster | | | Before |
| 8/1/1989 | BMB | Hill | Promoted to active roster | | | Before |
| 8/1/1989 | BMB | Sorrento | Promoted to active roster | | | Before |
| 8/1/1989 | BMB | West | Promoted to active roster | | | Before |
| 8/1/1989 | CEN | Fermin | Promoted to active roster | | | Before |
| 8/1/1989 | CIN | Larkin | Activated from Injured List | | | Before |
| 8/1/1989 | CIN | Williams | Demoted to reserve roster | | | Before |
| 8/1/1989 | CTW | LaPoint | Demoted to reserve roster | | | Before |
| 8/1/1989 | CTW | Russell | Promoted to active roster | | | Before |
| 8/1/1989 | DLM | Mason | Demoted to reserve roster | | | Before |
| 8/1/1989 | DLM | McDowell | Demoted to reserve roster | | | Before |
| 8/1/1989 | DLM | Polonia | Demoted to reserve roster | | | Before |
| 8/1/1989 | EVN | Alvarez | Promoted to active roster | | | Before |
| 8/1/1989 | EVN | Bass | Demoted to reserve roster | | | Before |
| 8/1/1989 | EVN | Higuera | Demoted to reserve roster | | | Before |
| 8/1/1989 | EVN | Jones | Demoted to reserve roster | | | Before |
| 8/1/1989 | EVN | Krukow | Promoted to active roster | | | Before |
| 8/1/1989 | EVN | Reed | Demoted to reserve roster | | | Before |
| 8/1/1989 | EVN | Stieb | Placed on Injured List | | 7/30/1989 | Before |
| 8/1/1989 | EVN | Trammell | Activated from Injured List | | | Before |
| 8/1/1989 | FER | Schatzeder | Demoted to reserve roster | | | Before |
| 8/1/1989 | NFG | Gossage | Demoted to reserve roster | | | Before |
| 8/1/1989 | TEW | Anthony | Promoted to active roster | | | Before |
| 8/1/1989 | TEW | Leary | Promoted to active roster | | | Before |
| 8/1/1989 | TEW | Morris | Demoted to reserve roster | | | Before |
| 8/1/1989 | TEW | Raines | Placed on Injured List | | 7/27/1989 | Before |
| 8/3/1989 | CEN | Anderson | Promoted to active roster | | | Before |
| 8/3/1989 | CEN | Anderson | Demoted to reserve roster | | | Before |
| 8/3/1989 | CEN | Anderson | Promoted to active roster | | | Before |
| 8/3/1989 | CEN | Fermin | Demoted to reserve roster | | | Before |
| 8/3/1989 | CTW | Kreuter | Demoted to reserve roster | | | Before |
| 8/3/1989 | CTW | Sinatro | Promoted to active roster | | | Before |
| 8/3/1989 | EVN | Jones | Demoted to reserve roster | | | Before |
| 8/3/1989 | EVN | Jones | Promoted to active roster | | | Before |
| 8/3/1989 | MAR | Heep | Promoted to active roster | | | Before |
| 8/3/1989 | MAR | Medina | Demoted to reserve roster | | | Before |
| 8/3/1989 | TEW | Hassey | Promoted to active roster | | | Before |
| 8/3/1989 | TEW | Valle | Placed on Injured List | | 8/2/1989 | Before |
| 8/3/1989 | THE | Sanders | Demoted to reserve roster | | | Before |
| 8/3/1989 | THE | Venable | Promoted to active roster | | | Before |
| 8/4/1989 | CTW | Hesketh | Demoted to reserve roster | | | Before |
| 8/4/1989 | CTW | Varsho | Promoted to active roster | | | Before |
| 8/5/1989 | CEN | Lake | Promoted to active roster | | | Before |
| 8/5/1989 | CEN | Minton | Demoted to reserve roster | | | Before |
| 8/5/1989 | GBP | Fisk | Demoted to reserve roster | | | Before |
| 8/5/1989 | GBP | Pagnozzi | Promoted to active roster | | | Before |
| 8/5/1989 | SUN | Bilardello | Promoted to active roster | | | Before |
| 8/5/1989 | SUN | Buhner | Promoted to active roster | | | Before |
| 8/5/1989 | SUN | Huff | Demoted to reserve roster | | | Before |
| 8/5/1989 | SUN | Robinson | Demoted to reserve roster | | | Before |
| 8/6/1989 | CIN | Sasser | Demoted to reserve roster | | | Before |
| 8/6/1989 | DLM | Abbott | Demoted to reserve roster | | | Before |
| 8/6/1989 | DLM | Brantley | Demoted to reserve roster | | | Before |
| 8/6/1989 | DLM | Mercker | Promoted to active roster | | | Before |
| 8/6/1989 | DLM | Olin | Promoted to active roster | | | Before |
| 8/6/1989 | DLM | Polonia | Promoted to active roster | | | Before |
| 8/6/1989 | DLM | Spiers | Demoted to reserve roster | | | Before |
| 8/6/1989 | EVN | Krukow | Demoted to reserve roster | | | Before |
| 8/7/1989 | CIN | Diaz | Promoted to active roster | | | Before |
| 8/7/1989 | EVN | Crawford | Demoted to reserve roster | | | Before |
| 8/7/1989 | EVN | Higuera | Promoted to active roster | | | Before |
| 8/7/1989 | EVN | Reed | Promoted to active roster | | | Before |
| 8/7/1989 | FER | Carreon | Demoted to reserve roster | | | Before |
| 8/7/1989 | FER | Finley | Activated from Injured List | | | Before |
| 8/7/1989 | FER | Hartley | Promoted to active roster | | | Before |
| 8/7/1989 | FER | Hill | Demoted to reserve roster | | | Before |
| 8/7/1989 | FER | Smith,Z | Demoted to reserve roster | | | Before |
| 8/7/1989 | FER | Trevino | Promoted to active roster | | | Before |
| 8/8/1989 | BAR | Montgomery | Demoted to reserve roster | | | Before |
| 8/10/1989 | BAR | Huismann | Promoted to active roster | | | Before |
| 8/10/1989 | CTW | Miller | Demoted to reserve roster | | | Before |
| 8/10/1989 | CTW | Nokes | Activated from Injured List | | | Before |
| 8/11/1989 | CIN | Daniels | Activated from Injured List | | | Before |
| 8/11/1989 | CIN | Guante | Promoted to active roster | | | Before |
| 8/11/1989 | CIN | Jackson | Placed on Injured List | | 8/8/1989 | Before |
| 8/11/1989 | CIN | Nixon | Demoted to reserve roster | | | Before |
| 8/11/1989 | RYK | Grant | Demoted to reserve roster | | | Before |
| 8/11/1989 | RYK | Manwaring | Placed on Injured List | | 8/11/1989 | Before |
| 8/11/1989 | RYK | Skinner | Promoted to active roster | | | Before |
| 8/11/1989 | RYK | Youmans | Promoted to active roster | | | Before |
| 8/12/1989 | BAR | Aguilera | Demoted to reserve roster | | | Before |
| 8/12/1989 | FHK | Burks | Demoted to reserve roster | | | Before |
| 8/12/1989 | FHK | Fletcher | Promoted to active roster | | | Before |
| 8/12/1989 | FHK | Gooden | Demoted to reserve roster | | | Before |
| 8/12/1989 | FHK | Grissom | Promoted to active roster | | | Before |
| 8/12/1989 | FHK | Hayes,C | Demoted to reserve roster | | | Before |
| 8/12/1989 | FHK | Machado | Promoted to active roster | | | Before |
| 8/12/1989 | FHK | Oliver | Demoted to reserve roster | | | Before |
| 8/12/1989 | FHK | Sabo | Activated from Injured List | | | Before |
| 8/12/1989 | THE | Smith,L | Activated from Injured List | | | Before |
| 8/12/1989 | THE | Venable | Demoted to reserve roster | | | Before |
| 8/13/1989 | CIN | Bankhead | Demoted to reserve roster | | | Before |
| 8/13/1989 | CIN | Scudder | Promoted to active roster | | | Before |
| 8/13/1989 | DLM | Henry | Promoted to active roster | | | Before |
| 8/13/1989 | DLM | McDowell | Promoted to active roster | | | Before |
| 8/13/1989 | DLM | McElroy | Demoted to reserve roster | | | Before |
| 8/13/1989 | DLM | Stottlemyre | Demoted to reserve roster | | | Before |
| 8/14/1989 | BAR | Anderson | Demoted to reserve roster | | | Before |
| 8/14/1989 | BAR | Boston | Promoted to active roster | | | Before |
| 8/14/1989 | BAR | Frohwirth | Demoted to reserve roster | | | Before |
| 8/14/1989 | BAR | Williamson | Activated from Injured List | | | Before |
| 8/14/1989 | CIN | Esasky | Demoted to reserve roster | | | Before |
| 8/14/1989 | CIN | Roomes | Promoted to active roster | | | Before |
| 8/14/1989 | EVN | Higuera | Placed on Injured List | | 8/10/1989 | Before |
| 8/14/1989 | EVN | Stieb | Activated from Injured List | | | Before |
| 8/14/1989 | NEE | Finley | Activated from Injured List | | | Before |
| 8/14/1989 | NEE | Jeffcoat | Demoted to reserve roster | | | Before |
| 8/14/1989 | NFG | Burns | Demoted to reserve roster | | | Before |
| 8/14/1989 | NFG | Plesac | Promoted to active roster | | | Before |
| 8/15/1989 | NEE | Darwin | Demoted to reserve roster | | | Before |
| 8/15/1989 | NEE | Jeffcoat | Promoted to active roster | | | Before |
| 8/16/1989 | MAR | Patterson | Promoted to active roster | | | Before |
| 8/16/1989 | MAR | Schiraldi | Placed on Injured List | | 8/14/1989 | Before |
| 8/16/1989 | NEE | Laudner | Promoted to active roster | | | Before |
| 8/16/1989 | NEE | Ready | Demoted to reserve roster | | | Before |
| 8/16/1989 | NEE | Reynolds | Promoted to active roster | | | Before |
| 8/16/1989 | NEE | Walling | Demoted to reserve roster | | | Before |
| 8/16/1989 | TEW | Anthony | Demoted to reserve roster | | | Before |
| 8/16/1989 | TEW | Raines | Activated from Injured List | | | Before |
| 8/17/1989 | EVN | Browning | Demoted to reserve roster | | | Before |
| 8/17/1989 | EVN | Hough | Promoted to active roster | | | Before |
| 8/17/1989 | FER | Hartley | Demoted to reserve roster | | | Before |
| 8/17/1989 | FER | Plunk | Promoted to active roster | | | Before |
| 8/17/1989 | FER | Schatzeder | Promoted to active roster | | | Before |
| 8/17/1989 | FER | Trout | Demoted to reserve roster | | | Before |
| 8/17/1989 | FER | Ward | Promoted to active roster | | | Before |
| 8/17/1989 | FER | Whitehurst | Demoted to reserve roster | | | Before |
| 8/18/1989 | EVN | Bass | Promoted to active roster | | | Before |
| 8/18/1989 | EVN | Dawson | Demoted to reserve roster | | | Before |
| 8/18/1989 | FHK | Dravecky | Promoted to active roster | | | Before |
| 8/18/1989 | FHK | Tewksbury | Demoted to reserve roster | | | Before |
| 8/18/1989 | GBP | Assenmacher | Demoted to reserve roster | | | Before |
| 8/18/1989 | GBP | Bush | Demoted to reserve roster | | | Before |
| 8/18/1989 | GBP | Farr | Promoted to active roster | | | Before |
| 8/18/1989 | GBP | Foley | Promoted to active roster | | | Before |
| 8/19/1989 | BAR | Clary | Promoted to active roster | | | Before |
| 8/19/1989 | BAR | Hrbek | Demoted to reserve roster | | | Before |
| 8/19/1989 | BAR | Moreland | Promoted to active roster | | | Before |
| 8/19/1989 | BAR | Moyer | Placed on Injured List | | 8/18/1989 | Before |
| 8/19/1989 | BAR | Reuschel | Promoted to active roster | | | Before |
| 8/19/1989 | BMB | Gleaton | Promoted to active roster | | | Before |
| 8/19/1989 | BMB | Schroeder | Placed on Injured List | | 8/13/1989 | Before |
| 8/19/1989 | EVN | Browning | Promoted to active roster | | | Before |
| 8/19/1989 | EVN | Hough | Demoted to reserve roster | | | Before |
| 8/19/1989 | NEE | Santovenia | Promoted to active roster | | | Before |
| 8/19/1989 | NEE | Thon | Demoted to reserve roster | | | Before |
| 8/19/1989 | SUN | Buhner | Demoted to reserve roster | | | Before |
| 8/19/1989 | SUN | Clutterbuck | Promoted to active roster | | | Before |
| 8/19/1989 | SUN | DeLeon | Promoted to active roster | | | Before |
| 8/19/1989 | SUN | Leach | Demoted to reserve roster | | | Before |
| 8/19/1989 | SUN | Martinez | Demoted to reserve roster | | | Before |
| 8/19/1989 | SUN | Sheets | Promoted to active roster | | | Before |
| 8/19/1989 | TEW | Geren | Demoted to reserve roster | | | Before |
| 8/19/1989 | TEW | Reed | Demoted to reserve roster | | | Before |
| 8/19/1989 | TEW | Stillwell | Promoted to active roster | | | Before |
| 8/19/1989 | TEW | Valle | Activated from Injured List | | | Before |
| 8/21/1989 | CIN | Larkin | Demoted to reserve roster | | | Before |
| 8/21/1989 | CIN | Pena | Demoted to reserve roster | | | Before |
| 8/21/1989 | CIN | Righetti | Promoted to active roster | | | Before |
| 8/21/1989 | CIN | Veres | Promoted to active roster | | | Before |
| 8/21/1989 | CTW | Tapani | Promoted to active roster | | | Before |
| 8/21/1989 | CTW | Viola | Placed on Injured List | | 8/19/1989 | Before |
| 8/22/1989 | FHK | Fletcher | Demoted to reserve roster | | | Before |
| 8/22/1989 | FHK | Hamilton | Promoted to active roster | | | Before |
| 8/22/1989 | NFG | DuBois | Demoted to reserve roster | | | Before |
| 8/22/1989 | NFG | Horn | Promoted to active roster | | | Before |
| 8/22/1989 | THE | LaValliere | Promoted to active roster | | | Before |
| 8/22/1989 | THE | Tettleton | Demoted to reserve roster | | | Before |
| 8/23/1989 | CEN | Carman | Demoted to reserve roster | | | Before |
| 8/23/1989 | CEN | Lake | Demoted to reserve roster | | | Before |
| 8/23/1989 | CEN | Minton | Promoted to active roster | | | Before |
| 8/23/1989 | CEN | Oberkfell | Promoted to active roster | | | Before |
| 8/23/1989 | CIN | Grimsley | Demoted to reserve roster | | | Before |
| 8/23/1989 | CIN | Gross | Promoted to active roster | | | Before |
| 8/23/1989 | CIN | Jackson | Activated from Injured List | | | Before |
| 8/23/1989 | CIN | McWilliams | Promoted to active roster | | | Before |
| 8/23/1989 | CIN | Scudder | Demoted to reserve roster | | | Before |
| 8/23/1989 | CIN | Veres | Demoted to reserve roster | | | Before |
| 8/23/1989 | CTW | Gibson | Demoted to reserve roster | | | Before |
| 8/23/1989 | CTW | Gonzales | Promoted to active roster | | | Before |
| 8/23/1989 | CTW | Walker | Demoted to reserve roster | | | Before |
| 8/23/1989 | CTW | Walker | Promoted to active roster | | | Before |
| 8/23/1989 | DLM | Griffin | Placed on Injured List | | 8/18/1989 | Before |
| 8/23/1989 | DLM | Thomas | Promoted to active roster | | | Before |
| 8/23/1989 | FHK | Allanson | Promoted to active roster | | | Before |
| 8/23/1989 | FHK | Hamilton | Demoted to reserve roster | | | Before |
| 8/24/1989 | DLM | Mercker | Demoted to reserve roster | | | Before |
| 8/24/1989 | DLM | Polonia | Demoted to reserve roster | | | Before |
| 8/24/1989 | DLM | Spiers | Promoted to active roster | | | Before |
| 8/24/1989 | DLM | Wilson | Promoted to active roster | | | Before |
| 8/24/1989 | MAR | Patterson | Demoted to reserve roster | | | Before |
| 8/26/1989 | NFG | Lemke | Promoted to active roster | | | Before |
| 8/26/1989 | NFG | Richie | Demoted to reserve roster | | | Before |
| 8/26/1989 | SUN | DeLeon | Demoted to reserve roster | | | Before |
| 8/26/1989 | SUN | Show | Promoted to active roster | | | Before |
| 8/28/1989 | MAR | Filer | Promoted to active roster | | | Before |
| 8/28/1989 | MAR | King | Demoted to reserve roster | | | Before |
| 8/28/1989 | MAR | Tibbs | Promoted to active roster | | | Before |
| 8/28/1989 | THE | Tettleton | Promoted to active roster | | | Before |
| 8/28/1989 | THE | Zeile | Demoted to reserve roster | | | Before |
| 8/29/1989 | BMB | Guetterman | Demoted to reserve roster | | | Before |
| 8/29/1989 | BMB | Schroeder | Activated from Injured List | | | Before |
| 8/29/1989 | CTW | Ritz | Promoted to active roster | | | Before |
| 8/29/1989 | CTW | Tapani | Demoted to reserve roster | | | Before |
| 8/30/1989 | BBG | Roberts | Demoted to reserve roster | | | Before |
| 8/30/1989 | SUN | Leiter | Demoted to reserve roster | | | Before |
| 8/31/1989 | BBG | White | Promoted to active roster | | | Before |
| 8/31/1989 | NFG | Farrell | Activated from Injured List | | | Before |
| 8/31/1989 | NFG | Thompson | Demoted to reserve roster | | | Before |
| 8/31/1989 | SUN | Innis | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Anderson | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Bolton | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Gonzalez | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Guetterman | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Hibbard | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Morman | Promoted to active roster | | | Before |
| 9/1/1989 | BMB | Reynolds | Promoted to active roster | | | Before |
| 9/1/1989 | CEN | Carman | Promoted to active roster | | | Before |
| 9/1/1989 | CEN | Fermin | Promoted to active roster | | | Before |
| 9/1/1989 | CEN | Wojna | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Bankhead | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Esasky | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Felder | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Flannery | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Grimsley | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Hatcher | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Lind | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Nixon | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Nixon | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Palacios | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Pevey | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Scudder | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Snider | Promoted to active roster | | | Before |
| 9/1/1989 | CIN | Williams | Promoted to active roster | | | Before |
| 9/1/1989 | CTW | Kreuter | Promoted to active roster | | | Before |
| 9/1/1989 | CTW | Walker | Promoted to active roster | | | Before |
| 9/1/1989 | EVN | Berryhill | Promoted to active roster | | | Before |
| 9/1/1989 | EVN | Camacho | Promoted to active roster | | | Before |
| 9/1/1989 | EVN | Garcia | Promoted to active roster | | | Before |
| 9/1/1989 | EVN | Hall | Promoted to active roster | | | Before |
| 9/1/1989 | EVN | Leach | Promoted to active roster | | | Before |
| 9/1/1989 | EVN | Marshall | Promoted to active roster | | | Before |
| 9/1/1989 | NEE | Hale | Promoted to active roster | | | Before |
| 9/1/1989 | NEE | Lindeman | Promoted to active roster | | | Before |
| 9/1/1989 | NEE | Myers | Promoted to active roster | | | Before |
| 9/1/1989 | NEE | Palmer | Promoted to active roster | | | Before |
| 9/1/1989 | NEE | Reimer | Promoted to active roster | | | Before |
| 9/1/1989 | NEE | Woodson | Promoted to active roster | | | Before |
| 9/1/1989 | NFG | Bream | Promoted to active roster | | | Before |
| 9/1/1989 | NFG | Eckersley | Promoted to active roster | | | Before |
| 9/1/1989 | NFG | Gossage | Promoted to active roster | | | Before |
| 9/1/1989 | NFG | Guthrie | Promoted to active roster | | | Before |
| 9/1/1989 | NFG | Richie | Promoted to active roster | | | Before |
| 9/1/1989 | THE | Combs | Promoted to active roster | | | Before |
| 9/1/1989 | THE | Langston | Demoted to reserve roster | | | Before |
| 9/2/1989 | BAR | Daugherty | Promoted to active roster | | | Before |
| 9/2/1989 | BAR | Espinoza | Promoted to active roster | | | Before |
| 9/2/1989 | BAR | Hammaker | Promoted to active roster | | | Before |
| 9/2/1989 | BAR | Smith | Demoted to reserve roster | | | Before |
| 9/2/1989 | BAR | Smith | Promoted to active roster | | | Before |
| 9/2/1989 | BAR | Webster | Promoted to active roster | | | Before |
| 9/2/1989 | BBG | Hatcher | Demoted to reserve roster | | | Before |
| 9/3/1989 | CTW | Robinson | Demoted to reserve roster | | | Before |
| 9/3/1989 | CTW | Robinson | Promoted to active roster | | | Before |
| 9/3/1989 | CTW | Viola | Activated from Injured List | | | Before |
| 9/3/1989 | DLM | Abbott | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Brantley | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Brock | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Davis | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Gedman | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Griffin | Activated from Injured List | | | Before |
| 9/3/1989 | DLM | Jose | Demoted to reserve roster | | | Before |
| 9/3/1989 | DLM | McGee | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | O'Neill | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Polonia | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Prince | Demoted to reserve roster | | | Before |
| 9/3/1989 | DLM | Stottlemyre | Promoted to active roster | | | Before |
| 9/3/1989 | DLM | Wegman | Promoted to active roster | | | Before |
| 9/3/1989 | TEW | Anthony | Promoted to active roster | | | Before |
| 9/3/1989 | TEW | Canseco | Promoted to active roster | | | Before |
| 9/3/1989 | TEW | Geren | Promoted to active roster | | | Before |
| 9/3/1989 | TEW | Oester | Promoted to active roster | | | Before |
| 9/4/1989 | BAR | Huismann | Demoted to reserve roster | | | Before |
| 9/4/1989 | FHK | Downs | Promoted to active roster | | | Before |
| 9/4/1989 | FHK | Dravecky | Demoted to reserve roster | | | Before |
| 9/5/1989 | BAR | Daugherty | Demoted to reserve roster | | | Before |
| 9/5/1989 | BAR | Knudson | Demoted to reserve roster | | | Before |
| 9/5/1989 | BBG | Benjamin | Promoted to active roster | | | Before |
| 9/5/1989 | BBG | Davis | Promoted to active roster | | | Before |
| 9/5/1989 | BBG | Dempsey | Promoted to active roster | | | Before |
| 9/5/1989 | BBG | Dyer | Promoted to active roster | | | Before |
| 9/5/1989 | BBG | Hernandez,K | Promoted to active roster | | | Before |
| 9/5/1989 | BBG | Spilman | Promoted to active roster | | | Before |
| 9/5/1989 | BBG | Williams,K | Promoted to active roster | | | Before |
| 9/5/1989 | GBP | Farr | Demoted to reserve roster | | | Before |
| 9/5/1989 | MAR | Birtsas | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | Gruber | Placed on Injured List | | 9/3/1989 | Before |
| 9/5/1989 | MAR | Hurst | Placed on Injured List | | 8/30/1989 | Before |
| 9/5/1989 | MAR | Johnson | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | King | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | Lombardi | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | Medina | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | Parent | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | Stoddard | Promoted to active roster | | | Before |
| 9/5/1989 | MAR | Strange | Promoted to active roster | | | Before |
| 9/5/1989 | THE | Dorsett | Promoted to active roster | | | Before |
| 9/5/1989 | THE | Lancaster | Promoted to active roster | | | Before |
| 9/5/1989 | THE | Lemon | Promoted to active roster | | | Before |
| 9/5/1989 | THE | Marzano | Promoted to active roster | | | Before |
| 9/5/1989 | THE | Mazzilli | Promoted to active roster | | | Before |
| 9/5/1989 | THE | McClure | Promoted to active roster | | | Before |
| 9/5/1989 | THE | Ramos | Promoted to active roster | | | Before |
| 9/6/1989 | CTW | Walk | Promoted to active roster | | | Before |
| 9/6/1989 | GBP | Andersen | Promoted to active roster | | | Before |
| 9/6/1989 | NFG | Cora | Promoted to active roster | | | Before |
| 9/6/1989 | NFG | Lemke | Demoted to reserve roster | | | Before |
| 9/6/1989 | RYK | Blankenship | Demoted to reserve roster | | | Before |
| 9/6/1989 | RYK | Brookens | Demoted to reserve roster | | | Before |
| 9/6/1989 | RYK | Jackson | Demoted to reserve roster | | | Before |
| 9/6/1989 | RYK | Jefferson | Promoted to active roster | | | Before |
| 9/6/1989 | RYK | Lovullo | Promoted to active roster | | | Before |
| 9/6/1989 | RYK | Meulens | Promoted to active roster | | | Before |
| 9/6/1989 | RYK | Meyer | Promoted to active roster | | | Before |
| 9/6/1989 | RYK | Terrell | Promoted to active roster | | | Before |
| 9/6/1989 | RYK | Virgil | Promoted to active roster | | | Before |
| 9/6/1989 | RYK | Wynne | Activated from Injured List | | | Before |
| 9/7/1989 | FER | Cabrera | Promoted to active roster | | | Before |
| 9/7/1989 | FER | Carreon | Promoted to active roster | | | Before |
| 9/7/1989 | FER | Hartley | Promoted to active roster | | | Before |
| 9/7/1989 | FER | Hoiles | Promoted to active roster | | | Before |
| 9/7/1989 | FER | Quinones | Promoted to active roster | | | Before |
| 9/7/1989 | FER | Whitehurst | Promoted to active roster | | | Before |
| 9/8/1989 | BMB | Bolton | Demoted to reserve roster | | | Before |
| 9/9/1989 | GBP | Andersen | Demoted to reserve roster | | | Before |
| 9/9/1989 | GBP | Ortiz | Promoted to active roster | | | Before |
| 9/9/1989 | GBP | Puckett | Demoted to reserve roster | | | Before |
| 9/9/1989 | GBP | Rijo | Promoted to active roster | | | Before |
| 9/9/1989 | SUN | Barrett | Promoted to active roster | | | Before |
| 9/9/1989 | SUN | Innis | Demoted to reserve roster | | | Before |
| 9/9/1989 | SUN | Leach | Promoted to active roster | | | Before |
| 9/9/1989 | SUN | Polidor | Promoted to active roster | | | Before |
| 9/9/1989 | SUN | Robinson | Promoted to active roster | | | Before |
| 9/9/1989 | THE | Howell | Demoted to reserve roster | | | Before |
| 9/9/1989 | THE | McCaskill | Promoted to active roster | | | Before |
| 9/11/1989 | CIN | Daniels | Demoted to reserve roster | | | Before |
| 9/11/1989 | FER | Perez | Demoted to reserve roster | | | Before |
| 9/12/1989 | FER | Cangelosi | Demoted to reserve roster | | | Before |
| 9/12/1989 | FER | Milligan | Demoted to reserve roster | | | Before |
| 9/12/1989 | FER | Trevino | Demoted to reserve roster | | | Before |
| 9/12/1989 | MAR | Perez | Demoted to reserve roster | | | Before |
| 9/14/1989 | CTW | Bautista | Promoted to active roster | | | Before |
| 9/14/1989 | CTW | Castillo | Promoted to active roster | | | Before |
| 9/14/1989 | CTW | Fetters | Promoted to active roster | | | Before |
| 9/14/1989 | CTW | Hesketh | Promoted to active roster | | | Before |
| 9/14/1989 | CTW | LaPoint | Promoted to active roster | | | Before |
| 9/14/1989 | CTW | Oliveras | Promoted to active roster | | | Before |
| 9/14/1989 | CTW | Stanley | Promoted to active roster | | | Before |
| 9/15/1989 | DLM | Maddux | Demoted to reserve roster | | | Before |
| 9/15/1989 | NEE | Tartabull | Demoted to reserve roster | | | Before |
| 9/15/1989 | NFG | Cora | Demoted to reserve roster | | | Before |
| 9/16/1989 | BMB | Gleaton | Demoted to reserve roster | | | Before |
| 9/16/1989 | BMB | Sorrento | Demoted to reserve roster | | | Before |
| 9/16/1989 | CEN | Lake | Promoted to active roster | | | Before |
| 9/16/1989 | CEN | Nelson | Demoted to reserve roster | | | Before |
| 9/16/1989 | CEN | Ripken,B | Promoted to active roster | | | Before |
| 9/16/1989 | CEN | Sharperson | Promoted to active roster | | | Before |
| 9/16/1989 | CEN | Wrona | Promoted to active roster | | | Before |
| 9/16/1989 | DLM | Sanderson | Promoted to active roster | | | Before |
| 9/16/1989 | EVN | Davidson | Promoted to active roster | | | Before |
| 9/16/1989 | MAR | Hurst | Activated from Injured List | | | Before |
| 9/16/1989 | NFG | Smith,D | Demoted to reserve roster | | | Before |
| 9/17/1989 | BAR | Clary | Demoted to reserve roster | | | Before |
| 9/17/1989 | BAR | Phillips | Demoted to reserve roster | | | Before |
| 9/17/1989 | CTW | Coolbaugh | Demoted to reserve roster | | | Before |
| 9/17/1989 | FHK | Harris | Demoted to reserve roster | | | Before |
| 9/17/1989 | RYK | Booker | Demoted to reserve roster | | | Before |
| 9/17/1989 | TEW | Harvey | Demoted to reserve roster | | | Before |
| 9/17/1989 | TEW | Hassey | Demoted to reserve roster | | | Before |
| 9/17/1989 | TEW | Hassey | Promoted to active roster | | | Before |
| 9/18/1989 | BAR | Anderson | Promoted to active roster | | | Before |
| 9/18/1989 | BAR | Castillo | Demoted to reserve roster | | | Before |
| 9/18/1989 | BAR | King | Promoted to active roster | | | Before |
| 9/18/1989 | BAR | Ventura | Promoted to active roster | | | Before |
| 9/18/1989 | CEN | Nelson | Promoted to active roster | | | Before |
| 9/18/1989 | CTW | Fetters | Demoted to reserve roster | | | Before |
| 9/18/1989 | FER | Bonds | Demoted to reserve roster | | | Before |
| 9/18/1989 | FER | Dopson | Demoted to reserve roster | | | Before |
| 9/18/1989 | FER | Greene | Promoted to active roster | | | Before |
| 9/18/1989 | FER | Hartley | Demoted to reserve roster | | | Before |
| 9/18/1989 | FER | Smith,Z | Promoted to active roster | | | Before |
| 9/18/1989 | FER | Speier | Promoted to active roster | | | Before |
| 9/18/1989 | FER | Whitehurst | Demoted to reserve roster | | | Before |
| 9/18/1989 | FHK | Brown | Placed on Injured List | | 9/13/1989 | Before |
| 9/18/1989 | FHK | Cadaret | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Evans | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Hamilton | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Jordan | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Mielke | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Monteleone | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Valenzuela | Promoted to active roster | | | Before |
| 9/18/1989 | FHK | Vizcaino | Promoted to active roster | | | Before |
| 9/18/1989 | GBP | Anderson | Promoted to active roster | | | Before |
| 9/18/1989 | MAR | Cerutti | Demoted to reserve roster | | | Before |
| 9/18/1989 | TEW | Johnson | Promoted to active roster | | | Before |
| 9/18/1989 | TEW | Morris | Promoted to active roster | | | Before |
| 9/18/1989 | TEW | Pico | Promoted to active roster | | | Before |
| 9/19/1989 | CTW | Ritz | Demoted to reserve roster | | | Before |
| 9/19/1989 | MAR | Schiraldi | Activated from Injured List | | | Before |
| 9/19/1989 | NEE | Clark,Ja | Demoted to reserve roster | | | Before |
| 9/19/1989 | SUN | Perry | Demoted to reserve roster | | | Before |
| 9/19/1989 | TEW | Geren | Demoted to reserve roster | | | Before |
| 9/20/1989 | BAR | Moyer | Activated from Injured List | | | Before |
| 9/20/1989 | CEN | Nelson | Demoted to reserve roster | | | Before |
| 9/20/1989 | FHK | Sabo | Placed on Injured List | | 9/17/1989 | Before |
| 9/20/1989 | MAR | Tolleson | Promoted to active roster | | | Before |
| 9/21/1989 | CEN | Sharperson | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Ashby | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Kreuter | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | LaPoint | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Mulliniks | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Pagliarulo | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Stanley | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Varsho | Demoted to reserve roster | | | Before |
| 9/21/1989 | CTW | Walk | Demoted to reserve roster | | | Before |
| 9/21/1989 | FER | Cabrera | Demoted to reserve roster | | | Before |
| 9/21/1989 | FER | Cangelosi | Promoted to active roster | | | Before |
| 9/21/1989 | FER | Carreon | Demoted to reserve roster | | | Before |
| 9/21/1989 | FER | Dopson | Promoted to active roster | | | Before |
| 9/21/1989 | FER | Dwyer | Promoted to active roster | | | Before |
| 9/21/1989 | FER | Greene | Demoted to reserve roster | | | Before |
| 9/21/1989 | FER | Hoiles | Demoted to reserve roster | | | Before |
| 9/21/1989 | FER | Plunk | Demoted to reserve roster | | | Before |
| 9/21/1989 | FER | Trevino | Promoted to active roster | | | Before |
| 9/21/1989 | NEE | Evans | Demoted to reserve roster | | | Before |
| 9/21/1989 | NEE | Sheffield | Demoted to reserve roster | | | Before |
| 9/21/1989 | NEE | Thon | Promoted to active roster | | | Before |
| 9/21/1989 | TEW | Ojeda | Demoted to reserve roster | | | Before |
| 9/21/1989 | TEW | Robinson | Demoted to reserve roster | | | Before |
| 9/22/1989 | BMB | Salas | Demoted to reserve roster | | | Before |
| 9/23/1989 | CTW | LaPoint | Promoted to active roster | | | Before |
| 9/23/1989 | CTW | Sinatro | Demoted to reserve roster | | | Before |
| 9/23/1989 | MAR | McReynolds | Demoted to reserve roster | | | Before |
| 9/23/1989 | NFG | Dunston | Demoted to reserve roster | | | Before |
| 9/23/1989 | NFG | Eckersley | Demoted to reserve roster | | | Before |
| 9/23/1989 | NFG | Plesac | Demoted to reserve roster | | | Before |
| 9/23/1989 | NFG | Quinones | Signed | | | Before |
| 9/23/1989 | SUN | Bell | Demoted to reserve roster | | | Before |
| 9/23/1989 | SUN | Bell | Promoted to active roster | | | Before |
| 9/23/1989 | SUN | Whitaker | Demoted to reserve roster | | | Before |
| 9/23/1989 | THE | Langston | Promoted to active roster | | | Before |
| 9/23/1989 | THE | Ryan | Demoted to reserve roster | | | Before |
| 9/24/1989 | BMB | Vaughn | Demoted to reserve roster | | | Before |
| 9/24/1989 | GBP | Arnsberg | Promoted to active roster | | | Before |
| 9/24/1989 | GBP | Leibrandt | Demoted to reserve roster | | | Before |
| 9/24/1989 | GBP | Puckett | Promoted to active roster | | | Before |
| 9/24/1989 | TEW | Hernandez | Promoted to active roster | | | Before |
| 9/24/1989 | TEW | Searage | Promoted to active roster | | | Before |
| 9/25/1989 | BBG | Saberhagen | Demoted to reserve roster | | | Before |
| 9/25/1989 | CIN | Fernandez | Demoted to reserve roster | | | Before |
| 9/25/1989 | EVN | Higuera | Activated from Injured List | | | Before |
| 9/25/1989 | EVN | Hough | Promoted to active roster | | | Before |
| 9/25/1989 | FER | Greene | Promoted to active roster | | | Before |
| 9/25/1989 | FER | Leiper | Demoted to reserve roster | | | Before |
| 9/25/1989 | NEE | Cary | Demoted to reserve roster | | | Before |
| 9/25/1989 | NEE | Griffey Jr. | Demoted to reserve roster | | | Before |
| 9/25/1989 | NEE | Woodson | Demoted to reserve roster | | | Before |
| 9/25/1989 | NFG | Yelding | Signed | | | Before |
| 9/25/1989 | THE | Russell | Demoted to reserve roster | | | Before |
| 9/27/1989 | BMB | Jacoby | Demoted to reserve roster | | | Before |
| 9/27/1989 | NEE | Petralli | Demoted to reserve roster | | | Before |
| 9/27/1989 | RYK | Bichette | Demoted to reserve roster | | | Before |
| 9/28/1989 | BBG | Franco | Demoted to reserve roster | | | Before |
| 9/28/1989 | BBG | Trillo | Promoted to active roster | | | Before |
| 9/28/1989 | FHK | Burke | Demoted to reserve roster | | | Before |
| 9/28/1989 | FHK | Davis | Demoted to reserve roster | | | Before |
| 9/28/1989 | MAR | Gruber | Activated from Injured List | | | Before |
| 9/28/1989 | NEE | Palmer | Demoted to reserve roster | | | Before |
| 9/28/1989 | NEE | Schooler | Demoted to reserve roster | | | Before |
| 9/28/1989 | NEE | Tekulve | Promoted to active roster | | | Before |
| 9/28/1989 | NFG | Gossage | Demoted to reserve roster | | | Before |
| 9/28/1989 | NFG | Guthrie | Demoted to reserve roster | | | Before |
| 9/28/1989 | NFG | Kingery | Promoted to active roster | | | Before |
| 9/28/1989 | NFG | Murphy | Promoted to active roster | | | Before |
| 9/29/1989 | BMB | McGwire | Demoted to reserve roster | | | Before |
| 9/29/1989 | CEN | Minton | Demoted to reserve roster | | | Before |
| 9/29/1989 | NEE | Hale | Demoted to reserve roster | | | Before |
| 9/29/1989 | NEE | Hoffman | Signed | | | Before |
| 9/29/1989 | TEW | Candelaria | Demoted to reserve roster | | | Before |
| 9/30/1989 | BAR | Gardner | Promoted to active roster | | | Before |
| 9/30/1989 | BAR | Smith | Demoted to reserve roster | | | Before |
| 9/30/1989 | CEN | Magadan | Demoted to reserve roster | | | Before |
| 9/30/1989 | CTW | Castillo | Demoted to reserve roster | | | Before |
| 9/30/1989 | CTW | Walk | Promoted to active roster | | | Before |
| 9/30/1989 | NEE | Belinda | Promoted to active roster | | | Before |
| 9/30/1989 | NEE | Hoffman | Demoted to reserve roster | | | Before |
| 9/30/1989 | NEE | Nichols | Promoted to active roster | | | Before |
| 9/30/1989 | NEE | Wilson | Promoted to active roster | | | Before |
| 9/30/1989 | NFG | Stanton | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Aguilera | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Anderson | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Castillo | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Clary | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Coleman | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Comstock | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Daugherty | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Espinoza | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Fossas | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Fossas | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Frohwirth | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Gardner | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Hammaker | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Hrbek | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | King | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Knudson | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Montgomery | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Moreland | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Phillips | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Reuschel | Placed on Injured List | | 9/29/1989 | Before |
| 10/2/1989 | BAR | Smith | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Sundberg | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Ventura | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Webster | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Wells | Promoted to active roster | | | Before |
| 10/2/1989 | BAR | Williamson | Demoted to reserve roster | | | Before |
| 10/2/1989 | BAR | Williamson | Promoted to active roster | | | Before |
| 10/2/1989 | MAR | Birtsas | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Brooks | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Cerutti | Promoted to active roster | | | Before |
| 10/2/1989 | MAR | Johnson | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | King | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Lombardi | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | McCullers | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | McReynolds | Promoted to active roster | | | Before |
| 10/2/1989 | MAR | Parent | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Patterson | Promoted to active roster | | | Before |
| 10/2/1989 | MAR | Perez | Promoted to active roster | | | Before |
| 10/2/1989 | MAR | Stoddard | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Strange | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Tibbs | Demoted to reserve roster | | | Before |
| 10/2/1989 | MAR | Tolleson | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Benjamin | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Davis | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Dempsey | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Dyer | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Franco | Promoted to active roster | | | Before |
| 10/3/1989 | BBG | Garrelts | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Garrelts | Promoted to active roster | | | Before |
| 10/3/1989 | BBG | Hatcher | Promoted to active roster | | | Before |
| 10/3/1989 | BBG | Hernandez,K | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Hickey | Promoted to active roster | | | Before |
| 10/3/1989 | BBG | Lefferts | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Roberts | Promoted to active roster | | | Before |
| 10/3/1989 | BBG | Saberhagen | Promoted to active roster | | | Before |
| 10/3/1989 | BBG | Spilman | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Trillo | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | White | Demoted to reserve roster | | | Before |
| 10/3/1989 | BBG | Williams,K | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Alvarez | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Berryhill | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Browning | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Camacho | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Davidson | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Dawson | Promoted to active roster | | | Before |
| 10/3/1989 | EVN | Garcia | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Hall | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Higuera | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Hough | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Krukow | Promoted to active roster | | | Before |
| 10/3/1989 | EVN | Leach | Demoted to reserve roster | | | Before |
| 10/3/1989 | EVN | Marshall | Demoted to reserve roster | | | Before |
| 10/8/1989 | MAR | Filer | Demoted to reserve roster | | | Before |
| 10/8/1989 | MAR | Filer | Promoted to active roster | | | Before |
| 10/8/1989 | MAR | Filer | Demoted to reserve roster | | | Before |
| 10/8/1989 | NFG | O'Brien | Placed on Injured List | | 9/24/1989 | Before |
| 10/13/1989 | EVN | Bair | Demoted to reserve roster | | | Before |
| 10/13/1989 | EVN | Browning | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Bream | Demoted to reserve roster | | | Before |
| 10/13/1989 | NFG | Burns | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | DiPino | Demoted to reserve roster | | | Before |
| 10/13/1989 | NFG | Dunston | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Eckersley | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Girardi | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Horn | Demoted to reserve roster | | | Before |
| 10/13/1989 | NFG | Kingery | Demoted to reserve roster | | | Before |
| 10/13/1989 | NFG | Plesac | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Quinones | Demoted to reserve roster | | | Before |
| 10/13/1989 | NFG | Smith,D | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Stanton | Promoted to active roster | | | Before |
| 10/13/1989 | NFG | Williams | Demoted to reserve roster | | | Before |
| 10/13/1989 | NFG | Yelding | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Corsi | Promoted to active roster | | | Before |
| 10/13/1989 | THE | Dorsett | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Hulett | Promoted to active roster | | | Before |
| 10/13/1989 | THE | Kipper | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Lancaster | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Langston | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Langston | Promoted to active roster | | | Before |
| 10/13/1989 | THE | Lemon | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Marzano | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Mazzilli | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | McCaskill | Placed on Injured List | | 9/23/1989 | Before |
| 10/13/1989 | THE | McClure | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Morgan | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Morgan | Promoted to active roster | | | Before |
| 10/13/1989 | THE | Ramos | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Russell | Promoted to active roster | | | Before |
| 10/13/1989 | THE | Ryan | Promoted to active roster | | | Before |
| 10/13/1989 | THE | Swindell | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Venable | Demoted to reserve roster | | | Before |
| 10/13/1989 | THE | Venable | Promoted to active roster | | | Before |
| 10/16/1989 | EVN | Krukow | Demoted to reserve roster | | | Before |
| 10/17/1989 | THE | Perry | Demoted to reserve roster | | | Before |
| 10/18/1989 | NFG | Stanton | Demoted to reserve roster | | | Before |
| 10/23/1989 | EVN | Higuera | Promoted to active roster | | | Before |
| 10/23/1989 | NFG | Stanton | Promoted to active roster | | | Before |
| 10/28/1989 | NFG | Stanton | Demoted to reserve roster | | | Before |