| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/6/2015 | CAR | Butera | Demoted to reserve roster | | | Before |
| 4/8/2015 | TEW | Descalso | Promoted to active roster | | | Before |
| 4/8/2015 | TEW | Mercer | Placed on Injured List | | 4/7/2015 | Before |
| 4/11/2015 | SOI | McGehee | Promoted to active roster | | | Before |
| 4/11/2015 | SOI | Wong | Placed on Injured List | | 4/11/2015 | Before |
| 4/12/2015 | BRK | Petit,Y | Promoted to active roster | | | Before |
| 4/12/2015 | BRK | Ray | Placed on Injured List | | 4/12/2015 | Before |
| 4/12/2015 | CEN | Blevins | Promoted to active roster | | | Before |
| 4/12/2015 | CEN | Guerra,Ju | Demoted to reserve roster | | | Before |
| 4/14/2015 | RMO | Beckham,G | Promoted to active roster | | | Before |
| 4/14/2015 | RMO | Gallo | Placed on Injured List | | 4/13/2015 | Before |
| 4/16/2015 | NEP | Givens | Placed on Injured List | | 4/16/2015 | Before |
| 4/16/2015 | NEP | Morales,F | Promoted to active roster | | | Before |
| 4/18/2015 | CIO | Casali | Promoted to active roster | | | Before |
| 4/18/2015 | CIO | Montero,M | Placed on Injured List | | 4/17/2015 | Before |
| 4/18/2015 | NEP | Jackson,E | Promoted to active roster | | | Before |
| 4/18/2015 | NEP | Quintana | Placed on Injured List | | 4/18/2015 | Before |
| 4/20/2015 | CSS | Alexander | Demoted to reserve roster | | | Before |
| 4/20/2015 | CSS | Torres,C | Promoted to active roster | | | Before |
| 4/20/2015 | HAR | Grandal | Placed on Injured List | | 4/20/2015 | Before |
| 4/20/2015 | HAR | Navarro,D | Promoted to active roster | | | Before |
| 4/21/2015 | CAR | Johnson,C | Promoted to active roster | | | Before |
| 4/21/2015 | CAR | Ross,J | Demoted to reserve roster | | | Before |
| 4/21/2015 | NEP | Guyer | Demoted to reserve roster | | | Before |
| 4/21/2015 | NEP | Matz | Promoted to active roster | | | Before |
| 4/21/2015 | RMO | Kepler | Demoted to reserve roster | | | Before |
| 4/21/2015 | RMO | Utley | Promoted to active roster | | | Before |
| 4/22/2015 | TEW | Garza | Placed on Injured List | | 4/22/2015 | Before |
| 4/22/2015 | TEW | Wainwright | Promoted to active roster | | | Before |
| 4/23/2015 | RMO | Callaspo | Promoted to active roster | | | Before |
| 4/23/2015 | RMO | Gardner | Placed on Injured List | | 4/22/2015 | Before |
| 4/24/2015 | CSS | Dull | Demoted to reserve roster | | | Before |
| 4/24/2015 | CSS | Jeffress | Promoted to active roster | | | Before |
| 4/24/2015 | FDH | Doolittle | Demoted to reserve roster | | | Before |
| 4/24/2015 | FDH | Rodriguez,Fe | Promoted to active roster | | | Before |
| 4/24/2015 | TEW | Colome | Placed on Injured List | | 4/24/2015 | Before |
| 4/24/2015 | TEW | Vincent | Promoted to active roster | | | Before |
| 4/25/2015 | CEN | Bedrosian | Placed on Injured List | | 4/25/2015 | Before |
| 4/25/2015 | CEN | Blevins | Demoted to reserve roster | | | Before |
| 4/25/2015 | CEN | Dickey | Promoted to active roster | | | Before |
| 4/25/2015 | CEN | Luetge | Promoted to active roster | | | Before |
| 4/26/2015 | CEN | Jennings,Da | Promoted to active roster | | | Before |
| 4/26/2015 | CEN | Luetge | Demoted to reserve roster | | | Before |
| 4/26/2015 | CSS | Johnson,J | Promoted to active roster | | | Before |
| 4/26/2015 | CSS | Reed,A | Placed on Injured List | | 4/24/2015 | Before |
| 4/26/2015 | HAR | Pearce | Promoted to active roster | | | Before |
| 4/26/2015 | HAR | Wright,D | Placed on Injured List | | 4/26/2015 | Before |
| 4/28/2015 | BRK | Aviles | Promoted to active roster | | | Before |
| 4/28/2015 | BRK | Correa | Demoted to reserve roster | | | Before |
| 4/28/2015 | BRK | Hamilton,B | Promoted to active roster | | | Before |
| 4/28/2015 | BRK | Hedges | Promoted to active roster | | | Before |
| 4/28/2015 | BRK | Iannetta | Demoted to reserve roster | | | Before |
| 4/28/2015 | BRK | Infante | Promoted to active roster | | | Before |
| 4/28/2015 | BRK | Joyce | Placed on Injured List | | 4/27/2015 | Before |
| 4/28/2015 | BRK | Kendrick,K | Promoted to active roster | | | Before |
| 4/28/2015 | BRK | Osuna | Demoted to reserve roster | | | Before |
| 4/28/2015 | BRK | Paxton | Demoted to reserve roster | | | Before |
| 4/28/2015 | BRK | Ray | Activated from Injured List | | | Before |
| 4/28/2015 | BRK | Smoak | Demoted to reserve roster | | | Before |
| 4/28/2015 | BRK | Stanton | Demoted to reserve roster | | | Before |
| 4/28/2015 | BRK | Yates | Promoted to active roster | | | Before |
| 4/28/2015 | GAR | Dickerson,C | Placed on Injured List | | 4/27/2015 | Before |
| 4/28/2015 | GAR | Robinson,C | Promoted to active roster | | | Before |
| 4/29/2015 | CIN | Drury | Promoted to active roster | | | Before |
| 4/29/2015 | CIN | Iglesias,J | Placed on Injured List | | 4/29/2015 | Before |
| 4/29/2015 | GAR | Herrera,O | Placed on Injured List | | 4/29/2015 | Before |
| 4/29/2015 | GAR | Shuck | Promoted to active roster | | | Before |
| 4/29/2015 | SOI | McGehee | Demoted to reserve roster | | | Before |
| 4/29/2015 | SOI | Wong | Activated from Injured List | | | Before |
| 4/30/2015 | CIO | Casali | Placed on Injured List | | 4/30/2015 | Before |
| 4/30/2015 | CIO | Murphy,J | Promoted to active roster | | | Before |
| 4/30/2015 | NEP | Colabello | Promoted to active roster | | | Before |
| 4/30/2015 | NEP | Conforto | Demoted to reserve roster | | | Before |
| 4/30/2015 | NEP | Miller,B | Promoted to active roster | | | Before |
| 4/30/2015 | NEP | Ruf | Demoted to reserve roster | | | Before |
| 5/1/2015 | NEP | Fields,J | Demoted to reserve roster | | | Before |
| 5/1/2015 | NEP | Givens | Activated from Injured List | | | Before |
| 5/1/2015 | NEP | Ruf | Promoted to active roster | | | Before |
| 5/1/2015 | NEP | Ruggiano | Demoted to reserve roster | | | Before |
| 5/2/2015 | CIO | Montero,M | Activated from Injured List | | | Before |
| 5/2/2015 | CIO | Murphy,J | Demoted to reserve roster | | | Before |
| 5/3/2015 | CSS | Broxton,J | Promoted to active roster | | | Before |
| 5/3/2015 | CSS | Sabathia | Promoted to active roster | | | Before |
| 5/3/2015 | CSS | Thornburg | Demoted to reserve roster | | | Before |
| 5/3/2015 | CSS | Wood,A | Placed on Injured List | | 5/3/2015 | Before |
| 5/3/2015 | GAR | Duffey | Promoted to active roster | | | Before |
| 5/3/2015 | GAR | Pineda | Demoted to reserve roster | | | Before |
| 5/3/2015 | NEP | Matz | Demoted to reserve roster | | | Before |
| 5/3/2015 | NEP | Quintana | Activated from Injured List | | | Before |
| 5/4/2015 | GAR | Buehrle | Promoted to active roster | | | Before |
| 5/4/2015 | GAR | Jepsen | Promoted to active roster | | | Before |
| 5/4/2015 | GAR | McGee | Promoted to active roster | | | Before |
| 5/4/2015 | GAR | Siegrist | Demoted to reserve roster | | | Before |
| 5/4/2015 | GAR | Street | Demoted to reserve roster | | | Before |
| 5/4/2015 | GAR | Volquez | Demoted to reserve roster | | | Before |
| 5/5/2015 | RMO | Beckham,G | Demoted to reserve roster | | | Before |
| 5/5/2015 | RMO | Beckham,G | Promoted to active roster | | | Before |
| 5/5/2015 | RMO | Callaspo | Demoted to reserve roster | | | Before |
| 5/5/2015 | RMO | Gallo | Activated from Injured List | | | Before |
| 5/5/2015 | TEW | Chacin | Promoted to active roster | | | Before |
| 5/5/2015 | TEW | Foltynewicz | Placed on Injured List | | 5/5/2015 | Before |
| 5/6/2015 | ANN | Leake | Placed on Injured List | | 5/5/2015 | Before |
| 5/6/2015 | ANN | Nuno | Promoted to active roster | | | Before |
| 5/7/2015 | CEN | Galvis | Promoted to active roster | | | Before |
| 5/7/2015 | CEN | Villar | Demoted to reserve roster | | | Before |
| 5/7/2015 | HHR | Holliday | Placed on Injured List | | 5/6/2015 | Before |
| 5/7/2015 | NYD | Bird | Promoted to active roster | | | Before |
| 5/7/2015 | NYD | Byrd | Promoted to active roster | | | Before |
| 5/7/2015 | NYD | Wallace | Demoted to reserve roster | | | Before |
| 5/7/2015 | NYD | Yelich | Placed on Injured List | | 5/7/2015 | Before |
| 5/7/2015 | RMO | Beckham,G | Demoted to reserve roster | | | Before |
| 5/7/2015 | RMO | Gardner | Activated from Injured List | | | Before |
| 5/8/2015 | HHR | Polanco,G | Promoted to active roster | | | Before |
| 5/9/2015 | CIN | Araujo | Promoted to active roster | | | Before |
| 5/9/2015 | CIN | Gilmartin | Demoted to reserve roster | | | Before |
| 5/9/2015 | CIN | Goeddel | Demoted to reserve roster | | | Before |
| 5/9/2015 | CIN | Hoover | Promoted to active roster | | | Before |
| 5/9/2015 | CIN | Miller,A | Demoted to reserve roster | | | Before |
| 5/9/2015 | CIN | Ramos,C | Promoted to active roster | | | Before |
| 5/9/2015 | CIN | Socolovich | Promoted to active roster | | | Before |
| 5/9/2015 | CIN | Wilhelmsen | Demoted to reserve roster | | | Before |
| 5/9/2015 | NEP | Conforto | Promoted to active roster | | | Before |
| 5/9/2015 | NEP | Ethier | Placed on Injured List | | 5/8/2015 | Before |
| 5/9/2015 | RMO | Davies,Z | Demoted to reserve roster | | | Before |
| 5/9/2015 | RMO | Eovaldi | Promoted to active roster | | | Before |
| 5/10/2015 | CIO | Gutierrez | Promoted to active roster | | | Before |
| 5/10/2015 | CIO | Thompson,T | Demoted to reserve roster | | | Before |
| 5/10/2015 | CSS | Broxton,J | Demoted to reserve roster | | | Before |
| 5/10/2015 | CSS | Reed,A | Activated from Injured List | | | Before |
| 5/10/2015 | NEP | Fields,J | Promoted to active roster | | | Before |
| 5/10/2015 | NEP | Kelley | Demoted to reserve roster | | | Before |
| 5/11/2015 | HHR | Iwakuma | Placed on Injured List | | 5/9/2015 | Before |
| 5/11/2015 | RMO | Muncy | Demoted to reserve roster | | | Before |
| 5/11/2015 | RMO | Tillman | Promoted to active roster | | | Before |
| 5/13/2015 | CAR | Boxberger | Promoted to active roster | | | Before |
| 5/13/2015 | CAR | Pence | Demoted to reserve roster | | | Before |
| 5/13/2015 | GAR | Dickerson,C | Activated from Injured List | | | Before |
| 5/13/2015 | GAR | Robinson,C | Demoted to reserve roster | | | Before |
| 5/14/2015 | BRK | Baez,J | Promoted to active roster | | | Before |
| 5/14/2015 | BRK | Hamilton,B | Demoted to reserve roster | | | Before |
| 5/14/2015 | BRK | Hardy,J | Placed on Injured List | | 5/14/2015 | Before |
| 5/14/2015 | BRK | Joyce | Activated from Injured List | | | Before |
| 5/14/2015 | BRK | Knebel | Promoted to active roster | | | Before |
| 5/14/2015 | BRK | Rivero | Demoted to reserve roster | | | Before |
| 5/14/2015 | CIN | Drury | Demoted to reserve roster | | | Before |
| 5/14/2015 | CIN | Iglesias,J | Activated from Injured List | | | Before |
| 5/14/2015 | GAR | Arencibia | Demoted to reserve roster | | | Before |
| 5/14/2015 | GAR | Gimenez | Promoted to active roster | | | Before |
| 5/14/2015 | GAR | Herrera,O | Activated from Injured List | | | Before |
| 5/14/2015 | GAR | Shuck | Demoted to reserve roster | | | Before |
| 5/14/2015 | SOI | Bauer | Demoted to reserve roster | | | Before |
| 5/14/2015 | SOI | Detwiler | Promoted to active roster | | | Before |
| 5/14/2015 | SOI | Gibson | Demoted to reserve roster | | | Before |
| 5/14/2015 | SOI | Lincecum | Promoted to active roster | | | Before |
| 5/15/2015 | CAR | Chavez | Placed on Injured List | | 5/15/2015 | Before |
| 5/15/2015 | CAR | McAllister | Promoted to active roster | | | Before |
| 5/15/2015 | CTW | Godley | Demoted to reserve roster | | | Before |
| 5/15/2015 | CTW | Leone | Promoted to active roster | | | Before |
| 5/15/2015 | NEP | Seager,C | Placed on Injured List | | 5/15/2015 | Before |
| 5/15/2015 | TEW | Garza | Activated from Injured List | | | Before |
| 5/15/2015 | TEW | Wainwright | Demoted to reserve roster | | | Before |
| 5/16/2015 | CEN | Bedrosian | Activated from Injured List | | | Before |
| 5/16/2015 | CEN | Neris | Demoted to reserve roster | | | Before |
| 5/16/2015 | CSS | Lamb,Ja | Promoted to active roster | | | Before |
| 5/16/2015 | CSS | Rosales | Demoted to reserve roster | | | Before |
| 5/16/2015 | HAR | Grandal | Activated from Injured List | | | Before |
| 5/16/2015 | HAR | Navarro,D | Demoted to reserve roster | | | Before |
| 5/16/2015 | HAR | Pearce | Demoted to reserve roster | | | Before |
| 5/16/2015 | HAR | Wright,D | Activated from Injured List | | | Before |
| 5/16/2015 | NEP | Ahmed | Promoted to active roster | | | Before |
| 5/16/2015 | NEP | Almonte,A | Promoted to active roster | | | Before |
| 5/16/2015 | NEP | den Dekker | Demoted to reserve roster | | | Before |
| 5/16/2015 | RMO | Beckham,G | Promoted to active roster | | | Before |
| 5/16/2015 | RMO | Vargas,J | Demoted to reserve roster | | | Before |
| 5/17/2015 | ANN | Alberto | Demoted to reserve roster | | | Before |
| 5/17/2015 | ANN | Goins | Promoted to active roster | | | Before |
| 5/17/2015 | CAR | Johnson,C | Demoted to reserve roster | | | Before |
| 5/17/2015 | CAR | Osich | Promoted to active roster | | | Before |
| 5/17/2015 | CTW | Barnhart | Promoted to active roster | | | Before |
| 5/17/2015 | CTW | Rojas | Demoted to reserve roster | | | Before |
| 5/17/2015 | GAR | Buehrle | Placed on Injured List | | 5/17/2015 | Before |
| 5/17/2015 | GAR | Volquez | Promoted to active roster | | | Before |
| 5/18/2015 | BRK | Buxton | Demoted to reserve roster | | | Before |
| 5/18/2015 | BRK | Hicks,A | Promoted to active roster | | | Before |
| 5/18/2015 | CEN | Travis | Promoted to active roster | | | Before |
| 5/18/2015 | CEN | Turner,T | Demoted to reserve roster | | | Before |
| 5/18/2015 | CSS | Bradley,J | Placed on Injured List | | 5/18/2015 | Before |
| 5/18/2015 | CSS | Gausman | Demoted to reserve roster | | | Before |
| 5/18/2015 | CSS | Myers | Promoted to active roster | | | Before |
| 5/18/2015 | CSS | Wood,A | Activated from Injured List | | | Before |
| 5/18/2015 | GAR | Duffey | Demoted to reserve roster | | | Before |
| 5/18/2015 | GAR | Pineda | Promoted to active roster | | | Before |
| 5/18/2015 | SOI | Bauer | Promoted to active roster | | | Before |
| 5/18/2015 | SOI | Corbin | Placed on Injured List | | 5/15/2015 | Before |
| 5/18/2015 | SOI | Detwiler | Demoted to reserve roster | | | Before |
| 5/18/2015 | SOI | Gibson | Promoted to active roster | | | Before |
| 5/19/2015 | BRK | Correa | Promoted to active roster | | | Before |
| 5/19/2015 | BRK | Infante | Demoted to reserve roster | | | Before |
| 5/20/2015 | BAR | Eickhoff | Demoted to reserve roster | | | Before |
| 5/20/2015 | BAR | Hill,R | Promoted to active roster | | | Before |
| 5/20/2015 | CAR | Johnson,C | Promoted to active roster | | | Before |
| 5/20/2015 | CAR | Osich | Demoted to reserve roster | | | Before |
| 5/20/2015 | FDH | Blair | Promoted to active roster | | | Before |
| 5/20/2015 | FDH | Tomlinson | Demoted to reserve roster | | | Before |
| 5/20/2015 | TEW | Chacin | Demoted to reserve roster | | | Before |
| 5/20/2015 | TEW | Foltynewicz | Activated from Injured List | | | Before |
| 5/21/2015 | BBG | Shields | Promoted to active roster | | | Before |
| 5/21/2015 | BBG | Smyly | Demoted to reserve roster | | | Before |
| 5/22/2015 | CTW | Martinez,N | Promoted to active roster | | | Before |
| 5/22/2015 | CTW | Severino,L | Demoted to reserve roster | | | Before |
| 5/22/2015 | HHR | Holliday | Activated from Injured List | | | Before |
| 5/22/2015 | HHR | Polanco,G | Demoted to reserve roster | | | Before |
| 5/23/2015 | HAR | Navarro,D | Promoted to active roster | | | Before |
| 5/23/2015 | HAR | Wright,D | Placed on Injured List | | 5/23/2015 | Before |
| 5/23/2015 | NEP | Conforto | Demoted to reserve roster | | | Before |
| 5/23/2015 | NEP | Ethier | Activated from Injured List | | | Before |
| 5/23/2015 | NEP | Givens | Demoted to reserve roster | | | Before |
| 5/23/2015 | NEP | Kelley | Promoted to active roster | | | Before |
| 5/23/2015 | NEP | Peavy | Promoted to active roster | | | Before |
| 5/23/2015 | NEP | Tanaka | Demoted to reserve roster | | | Before |
| 5/23/2015 | NYD | Cozart | Placed on Injured List | | 5/23/2015 | Before |
| 5/23/2015 | NYD | Ynoa | Promoted to active roster | | | Before |
| 5/24/2015 | CEN | Barney | Demoted to reserve roster | | | Before |
| 5/24/2015 | CEN | Sanchez,H | Promoted to active roster | | | Before |
| 5/24/2015 | CIO | Betances | Demoted to reserve roster | | | Before |
| 5/24/2015 | CIO | Sipp | Promoted to active roster | | | Before |
| 5/24/2015 | CSS | Beckham,T | Promoted to active roster | | | Before |
| 5/24/2015 | CSS | Braun | Placed on Injured List | | 5/23/2015 | Before |
| 5/24/2015 | CSS | Jones,N | Placed on Injured List | | 5/23/2015 | Before |
| 5/24/2015 | CSS | LeMahieu | Placed on Injured List | | 5/23/2015 | Before |
| 5/24/2015 | CSS | Ross,D | Promoted to active roster | | | Before |
| 5/24/2015 | CSS | Thornburg | Promoted to active roster | | | Before |
| 5/25/2015 | ANN | Gomes,Y | Placed on Injured List | | 5/25/2015 | Before |
| 5/25/2015 | ANN | Plawecki | Promoted to active roster | | | Before |
| 5/25/2015 | CEN | Barney | Promoted to active roster | | | Before |
| 5/25/2015 | CEN | Sanchez,H | Demoted to reserve roster | | | Before |
| 5/25/2015 | CTW | Gray,J | Demoted to reserve roster | | | Before |
| 5/25/2015 | CTW | Matzek | Promoted to active roster | | | Before |
| 5/25/2015 | NYD | Byrd | Demoted to reserve roster | | | Before |
| 5/25/2015 | NYD | Yelich | Activated from Injured List | | | Before |
| 5/26/2015 | FDH | Blair | Demoted to reserve roster | | | Before |
| 5/26/2015 | FDH | Gordon,A | Placed on Injured List | | 5/26/2015 | Before |
| 5/26/2015 | FDH | Tomlinson | Promoted to active roster | | | Before |
| 5/27/2015 | BRK | Lohse | Placed on Injured List | | 5/27/2015 | Before |
| 5/27/2015 | BRK | Paxton | Promoted to active roster | | | Before |
| 5/27/2015 | CEN | Duvall | Demoted to reserve roster | | | Before |
| 5/27/2015 | CEN | Marte,J | Promoted to active roster | | | Before |
| 5/27/2015 | CEN | May | Promoted to active roster | | | Before |
| 5/27/2015 | CEN | Norris,Da | Demoted to reserve roster | | | Before |
| 5/27/2015 | CIO | Buchholz | Promoted to active roster | | | Before |
| 5/27/2015 | CIO | Kazmir | Demoted to reserve roster | | | Before |
| 5/29/2015 | CIN | Allen | Demoted to reserve roster | | | Before |
| 5/29/2015 | CIN | Goeddel | Promoted to active roster | | | Before |
| 5/29/2015 | CIN | Hoover | Demoted to reserve roster | | | Before |
| 5/29/2015 | CIN | Miller,A | Promoted to active roster | | | Before |
| 5/29/2015 | CIN | Sanchez,An | Demoted to reserve roster | | | Before |
| 5/29/2015 | CIN | Stroman | Promoted to active roster | | | Before |
| 5/29/2015 | CIN | Wilhelmsen | Promoted to active roster | | | Before |
| 5/29/2015 | CIN | Wood,T | Demoted to reserve roster | | | Before |
| 5/29/2015 | FDH | Gomez,C | Promoted to active roster | | | Before |
| 5/30/2015 | CAR | Chavez | Activated from Injured List | | | Before |
| 5/30/2015 | CAR | McAllister | Demoted to reserve roster | | | Before |
| 5/30/2015 | GAR | Encarnacion | Placed on Injured List | | 5/30/2015 | Before |
| 5/30/2015 | GAR | Robinson,C | Promoted to active roster | | | Before |
| 5/30/2015 | HHR | Elias | Promoted to active roster | | | Before |
| 5/30/2015 | HHR | Kimbrel | Promoted to active roster | | | Before |
| 5/30/2015 | HHR | Shreve | Demoted to reserve roster | | | Before |
| 5/30/2015 | NEP | Lopez,Ja | Promoted to active roster | | | Before |
| 5/30/2015 | NEP | Wilson,A | Demoted to reserve roster | | | Before |
| 5/30/2015 | SOI | Corbin | Activated from Injured List | | | Before |
| 5/30/2015 | SOI | Nola | Demoted to reserve roster | | | Before |
| 5/30/2015 | TEW | Colome | Activated from Injured List | | | Before |
| 5/30/2015 | TEW | Vincent | Demoted to reserve roster | | | Before |
| 6/1/2015 | ANN | Leake | Activated from Injured List | | | Before |
| 6/1/2015 | ANN | Nuno | Demoted to reserve roster | | | Before |
| 6/1/2015 | CSS | Broxton,J | Promoted to active roster | | | Before |
| 6/1/2015 | CSS | Thornburg | Demoted to reserve roster | | | Before |
| 6/1/2015 | FDH | McCullers | Promoted to active roster | | | Before |
| 6/1/2015 | FDH | McHugh | Demoted to reserve roster | | | Before |
| 6/1/2015 | FDH | Qualls | Promoted to active roster | | | Before |
| 6/1/2015 | FDH | Schultz | Demoted to reserve roster | | | Before |
| 6/2/2015 | CAR | Hudson,D | Promoted to active roster | | | Before |
| 6/2/2015 | CAR | Venable | Demoted to reserve roster | | | Before |
| 6/2/2015 | CAR | Iglesias,R | Traded away | RMO | | After |
| 6/2/2015 | CAR | Reddick | Acquired via trade | RMO | | After |
| 6/2/2015 | CSS | Bradley,J | Activated from Injured List | | | Before |
| 6/2/2015 | CSS | Myers | Demoted to reserve roster | | | Before |
| 6/2/2015 | RMO | Aardsma | Demoted to reserve roster | | | Before |
| 6/2/2015 | RMO | Callaspo | Demoted to reserve roster | | | Before |
| 6/2/2015 | RMO | Callaspo | Promoted to active roster | | | Before |
| 6/2/2015 | RMO | Gallo | Demoted to reserve roster | | | Before |
| 6/2/2015 | RMO | Hill,A | Promoted to active roster | | | Before |
| 6/2/2015 | RMO | Sucre | Promoted to active roster | | | Before |
| 6/2/2015 | RMO | Villanueva | Demoted to reserve roster | | | Before |
| 6/2/2015 | RMO | Walker,C | Promoted to active roster | | | Before |
| 6/2/2015 | RMO | Iglesias,R | Acquired via trade | CAR | | After |
| 6/2/2015 | RMO | Reddick | Traded away | CAR | | After |
| 6/3/2015 | BRK | Baez,J | Demoted to reserve roster | | | Before |
| 6/3/2015 | BRK | Greene | Demoted to reserve roster | | | Before |
| 6/3/2015 | BRK | Hardy,J | Activated from Injured List | | | Before |
| 6/3/2015 | BRK | Hardy,J | Demoted to reserve roster | | | Before |
| 6/3/2015 | BRK | Hedges | Demoted to reserve roster | | | Before |
| 6/3/2015 | BRK | Iannetta | Promoted to active roster | | | Before |
| 6/3/2015 | BRK | Osuna | Promoted to active roster | | | Before |
| 6/3/2015 | BRK | Stanton | Promoted to active roster | | | Before |
| 6/4/2015 | BAR | Pena,B | Promoted to active roster | | | Before |
| 6/4/2015 | BAR | Wieters | Placed on Injured List | | 6/3/2015 | Before |
| 6/4/2015 | CSS | Gausman | Promoted to active roster | | | Before |
| 6/4/2015 | CSS | Happ | Demoted to reserve roster | | | Before |
| 6/4/2015 | CTW | Callaspo | Acquired via trade | RMO | | After |
| 6/4/2015 | CTW | Moss | Traded away | RMO | | After |
| 6/4/2015 | CTW | Nelson | Acquired via trade | RMO | | After |
| 6/4/2015 | CTW | Reynolds,Mar | Traded away | RMO | | After |
| 6/4/2015 | RMO | Callaspo | Traded away | CTW | | After |
| 6/4/2015 | RMO | Moss | Acquired via trade | CTW | | After |
| 6/4/2015 | RMO | Nelson | Traded away | CTW | | After |
| 6/4/2015 | RMO | Reynolds,Mar | Acquired via trade | CTW | | After |
| 6/4/2015 | SOI | McFarland | Demoted to reserve roster | | | Before |
| 6/4/2015 | SOI | Pressly | Promoted to active roster | | | Before |
| 6/5/2015 | BBG | Alburquerque | Promoted to active roster | | | Before |
| 6/5/2015 | BBG | Worley | Demoted to reserve roster | | | Before |
| 6/5/2015 | CEN | Adams,M | Promoted to active roster | | | Before |
| 6/5/2015 | CEN | Teixeira | Demoted to reserve roster | | | Before |
| 6/5/2015 | CTW | Matzek | Demoted to reserve roster | | | Before |
| 6/5/2015 | NEP | Barnes,A | Promoted to active roster | | | Before |
| 6/5/2015 | NEP | Conger | Demoted to reserve roster | | | Before |
| 6/5/2015 | NEP | Fields,J | Demoted to reserve roster | | | Before |
| 6/5/2015 | NEP | Wilson,A | Promoted to active roster | | | Before |
| 6/5/2015 | RMO | Abad | Promoted to active roster | | | Before |
| 6/5/2015 | RMO | de la Rosa,R | Demoted to reserve roster | | | Before |
| 6/5/2015 | RMO | Urena | Promoted to active roster | | | Before |
| 6/7/2015 | GAR | Buehrle | Activated from Injured List | | | Before |
| 6/7/2015 | GAR | Volquez | Demoted to reserve roster | | | Before |
| 6/8/2015 | HAR | Barraclough | Demoted to reserve roster | | | Before |
| 6/8/2015 | HHR | Bolsinger | Placed on Injured List | | 6/6/2015 | Before |
| 6/8/2015 | HHR | Elias | Demoted to reserve roster | | | Before |
| 6/8/2015 | HHR | Iwakuma | Activated from Injured List | | | Before |
| 6/8/2015 | HHR | Kelly,J | Promoted to active roster | | | Before |
| 6/8/2015 | NYD | Heathcott | Demoted to reserve roster | | | Before |
| 6/8/2015 | NYD | Schebler | Promoted to active roster | | | Before |
| 6/8/2015 | TEW | Chacin | Promoted to active roster | | | Before |
| 6/8/2015 | TEW | Hatcher | Promoted to active roster | | | Before |
| 6/8/2015 | TEW | Hernandez,D | Demoted to reserve roster | | | Before |
| 6/8/2015 | TEW | Koehler | Placed on Injured List | | 6/8/2015 | Before |
| 6/8/2015 | TEW | Mercer | Activated from Injured List | | | Before |
| 6/8/2015 | TEW | Solano,D | Demoted to reserve roster | | | Before |
| 6/9/2015 | FDH | Gomes,J | Promoted to active roster | | | Before |
| 6/9/2015 | FDH | Vargas,K | Placed on Injured List | | 6/9/2015 | Before |
| 6/9/2015 | GAR | Marte,S | Placed on Injured List | | 6/8/2015 | Before |
| 6/9/2015 | GAR | Shuck | Promoted to active roster | | | Before |
| 6/10/2015 | BAR | Hill,R | Demoted to reserve roster | | | Before |
| 6/10/2015 | BAR | Tepera | Promoted to active roster | | | Before |
| 6/10/2015 | CIN | Allen | Promoted to active roster | | | Before |
| 6/10/2015 | CIN | Burnett | Demoted to reserve roster | | | Before |
| 6/10/2015 | CIN | Conley | Promoted to active roster | | | Before |
| 6/10/2015 | CIN | Gilmartin | Promoted to active roster | | | Before |
| 6/10/2015 | CIN | Socolovich | Demoted to reserve roster | | | Before |
| 6/10/2015 | CIN | Stroman | Demoted to reserve roster | | | Before |
| 6/10/2015 | CIN | Wilhelmsen | Demoted to reserve roster | | | Before |
| 6/10/2015 | CIN | Wood,T | Promoted to active roster | | | Before |
| 6/10/2015 | CTW | Leone | Demoted to reserve roster | | | Before |
| 6/10/2015 | CTW | Matzek | Promoted to active roster | | | Before |
| 6/10/2015 | NYD | Gonzalez,Ch | Promoted to active roster | | | Before |
| 6/10/2015 | NYD | Hahn | Demoted to reserve roster | | | Before |
| 6/11/2015 | ANN | Francoeur | Promoted to active roster | | | Before |
| 6/11/2015 | ANN | Gomes,Y | Activated from Injured List | | | Before |
| 6/11/2015 | ANN | Pham | Demoted to reserve roster | | | Before |
| 6/11/2015 | ANN | Plawecki | Demoted to reserve roster | | | Before |
| 6/11/2015 | BBG | Gomez,J | Promoted to active roster | | | Before |
| 6/11/2015 | BBG | Holland,G | Demoted to reserve roster | | | Before |
| 6/13/2015 | CSS | Broxton,J | Demoted to reserve roster | | | Before |
| 6/13/2015 | CSS | Jones,N | Activated from Injured List | | | Before |
| 6/14/2015 | CAR | Bassitt | Demoted to reserve roster | | | Before |
| 6/14/2015 | CAR | Ross,J | Promoted to active roster | | | Before |
| 6/14/2015 | CIO | Murphy,J | Promoted to active roster | | | Before |
| 6/14/2015 | CIO | Perez,R | Placed on Injured List | | 6/14/2015 | Before |
| 6/14/2015 | CTW | Kahnle | Demoted to reserve roster | | | Before |
| 6/14/2015 | GAR | Encarnacion | Activated from Injured List | | | Before |
| 6/14/2015 | GAR | Robinson,C | Demoted to reserve roster | | | Before |
| 6/14/2015 | NEP | Fields,J | Promoted to active roster | | | Before |
| 6/14/2015 | NEP | Franco | Promoted to active roster | | | Before |
| 6/14/2015 | NEP | Kelley | Placed on Injured List | | 6/12/2015 | Before |
| 6/14/2015 | NEP | Sano | Demoted to reserve roster | | | Before |
| 6/15/2015 | CTW | Edwards Jr. | Promoted to active roster | | | Before |
| 6/16/2015 | CIO | Tomlin | Promoted to active roster | | | Before |
| 6/16/2015 | CIO | Warren | Demoted to reserve roster | | | Before |
| 6/16/2015 | NYD | Cozart | Activated from Injured List | | | Before |
| 6/16/2015 | NYD | Ynoa | Demoted to reserve roster | | | Before |
| 6/17/2015 | ANN | Gomes,Y | Placed on Injured List | | 6/17/2015 | Before |
| 6/17/2015 | ANN | Plawecki | Promoted to active roster | | | Before |
| 6/17/2015 | BRK | Hedges | Promoted to active roster | | | Before |
| 6/17/2015 | BRK | Leon,S | Placed on Injured List | | 6/17/2015 | Before |
| 6/17/2015 | BRK | Lohse | Activated from Injured List | | | Before |
| 6/17/2015 | BRK | Lohse | Demoted to reserve roster | | | Before |
| 6/17/2015 | BRK | Rivero | Promoted to active roster | | | Before |
| 6/17/2015 | BRK | Yates | Demoted to reserve roster | | | Before |
| 6/17/2015 | CTW | Gonzalez,Mi | Promoted to active roster | | | Before |
| 6/17/2015 | CTW | Montgomery | Placed on Injured List | | 6/17/2015 | Before |
| 6/17/2015 | HAR | Navarro,D | Placed on Injured List | | 6/16/2015 | Before |
| 6/17/2015 | HAR | Strickland | Promoted to active roster | | | Before |
| 6/17/2015 | HAR | Wright,D | Activated from Injured List | | | Before |
| 6/17/2015 | RMO | Cosart | Promoted to active roster | | | Before |
| 6/17/2015 | RMO | Gray,S | Placed on Injured List | | 6/17/2015 | Before |
| 6/18/2015 | BAR | d'Arnaud,T | Demoted to reserve roster | | | Before |
| 6/18/2015 | BAR | Wieters | Activated from Injured List | | | Before |
| 6/18/2015 | CAR | Bettis | Promoted to active roster | | | Before |
| 6/18/2015 | CAR | DeSclafani | Demoted to reserve roster | | | Before |
| 6/18/2015 | NEP | Givens | Promoted to active roster | | | Before |
| 6/18/2015 | NEP | Jackson,E | Demoted to reserve roster | | | Before |
| 6/18/2015 | NEP | Ramirez,E | Demoted to reserve roster | | | Before |
| 6/18/2015 | NEP | Tanaka | Promoted to active roster | | | Before |
| 6/19/2015 | CIN | Drury | Promoted to active roster | | | Before |
| 6/19/2015 | CIN | Peraza | Demoted to reserve roster | | | Before |
| 6/19/2015 | TEW | Chacin | Demoted to reserve roster | | | Before |
| 6/19/2015 | TEW | Maurer | Promoted to active roster | | | Before |
| 6/19/2015 | TEW | Moore,M | Promoted to active roster | | | Before |
| 6/19/2015 | TEW | Robles | Placed on Injured List | | 6/18/2015 | Before |
| 6/20/2015 | ANN | Hellickson | Placed on Injured List | | 6/20/2015 | Before |
| 6/20/2015 | ANN | Nuno | Promoted to active roster | | | Before |
| 6/22/2015 | CSS | Beckham,T | Demoted to reserve roster | | | Before |
| 6/22/2015 | CSS | Bradley,J | Demoted to reserve roster | | | Before |
| 6/22/2015 | CSS | Braun | Activated from Injured List | | | Before |
| 6/22/2015 | CSS | LeMahieu | Activated from Injured List | | | Before |
| 6/22/2015 | CTW | Difo | Promoted to active roster | | | Before |
| 6/22/2015 | CTW | Spangenberg | Demoted to reserve roster | | | Before |
| 6/23/2015 | CTW | Bradley,A | Demoted to reserve roster | | | Before |
| 6/23/2015 | CTW | Tuivailala | Promoted to active roster | | | Before |
| 6/23/2015 | GAR | Marte,S | Activated from Injured List | | | Before |
| 6/23/2015 | GAR | Shuck | Demoted to reserve roster | | | Before |
| 6/23/2015 | SOI | Bourgeois | Promoted to active roster | | | Before |
| 6/23/2015 | SOI | Shaw,T | Demoted to reserve roster | | | Before |
| 6/24/2015 | SOI | Cole,G | Placed on Injured List | | 6/24/2015 | Before |
| 6/24/2015 | SOI | Perez,O | Promoted to active roster | | | Before |
| 6/25/2015 | BBG | Motte | Promoted to active roster | | | Before |
| 6/25/2015 | BBG | Ross,R | Demoted to reserve roster | | | Before |
| 6/25/2015 | CTW | Cahill | Promoted to active roster | | | Before |
| 6/25/2015 | CTW | Verlander | Demoted to reserve roster | | | Before |
| 6/25/2015 | DLM | Belisle | Demoted to reserve roster | | | Before |
| 6/25/2015 | DLM | Chen,W | Promoted to active roster | | | Before |
| 6/25/2015 | DLM | Herrmann | Promoted to active roster | | | Before |
| 6/25/2015 | DLM | Howell | Promoted to active roster | | | Before |
| 6/25/2015 | DLM | Otero | Demoted to reserve roster | | | Before |
| 6/25/2015 | DLM | Schwarber | Demoted to reserve roster | | | Before |
| 6/25/2015 | NYD | Bird | Demoted to reserve roster | | | Before |
| 6/25/2015 | NYD | Byrd | Promoted to active roster | | | Before |
| 6/25/2015 | SOI | Avila | Placed on Injured List | | 6/25/2015 | Before |
| 6/25/2015 | SOI | Rivera,R | Promoted to active roster | | | Before |
| 6/26/2015 | CIO | Casali | Activated from Injured List | | | Before |
| 6/26/2015 | CIO | Murphy,J | Demoted to reserve roster | | | Before |
| 6/26/2015 | HHR | Bolsinger | Activated from Injured List | | | Before |
| 6/26/2015 | HHR | Cabrera,A | Promoted to active roster | | | Before |
| 6/26/2015 | HHR | deGrom | Placed on Injured List | | 6/24/2015 | Before |
| 6/26/2015 | HHR | Kang | Placed on Injured List | | 6/25/2015 | Before |
| 6/26/2015 | NEP | Givens | Demoted to reserve roster | | | Before |
| 6/26/2015 | NEP | Jackson,E | Promoted to active roster | | | Before |
| 6/27/2015 | RMO | Gonzales | Promoted to active roster | | | Before |
| 6/27/2015 | RMO | Iglesias,R | Placed on Injured List | | 6/27/2015 | Before |
| 6/27/2015 | SOI | Corbin | Demoted to reserve roster | | | Before |
| 6/27/2015 | SOI | Montas | Promoted to active roster | | | Before |
| 6/28/2015 | BBG | Heston | Promoted to active roster | | | Before |
| 6/28/2015 | BBG | Morton | Demoted to reserve roster | | | Before |
| 6/28/2015 | CSS | Despaigne | Promoted to active roster | | | Before |
| 6/28/2015 | CSS | Jones,N | Demoted to reserve roster | | | Before |
| 6/28/2015 | CTW | Edwards Jr. | Demoted to reserve roster | | | Before |
| 6/28/2015 | CTW | Swarzak | Promoted to active roster | | | Before |
| 6/28/2015 | RMO | Caminero | Promoted to active roster | | | Before |
| 6/28/2015 | RMO | Gonzales | Demoted to reserve roster | | | Before |
| 6/29/2015 | ANN | Marte,K | Demoted to reserve roster | | | Before |
| 6/29/2015 | CAR | DeSclafani | Promoted to active roster | | | Before |
| 6/29/2015 | CAR | Hudson,D | Demoted to reserve roster | | | Before |
| 6/29/2015 | CIN | Gonzalez,G | Demoted to reserve roster | | | Before |
| 6/29/2015 | CIN | Parra,M | Promoted to active roster | | | Before |
| 6/29/2015 | CTW | Guthrie | Promoted to active roster | | | Before |
| 6/29/2015 | CTW | Nelson | Placed on Injured List | | 6/29/2015 | Before |
| 6/29/2015 | NEP | Barnes,A | Demoted to reserve roster | | | Before |
| 6/29/2015 | NEP | Dietrich | Promoted to active roster | | | Before |
| 6/29/2015 | NEP | Saltalamacchia | Promoted to active roster | | | Before |
| 6/29/2015 | NEP | Schoop | Demoted to reserve roster | | | Before |
| 6/30/2015 | NEP | Morales,F | Demoted to reserve roster | | | Before |
| 6/30/2015 | NEP | Salas | Promoted to active roster | | | Before |
| 7/1/2015 | BAR | Jaso | Promoted to active roster | | | Before |
| 7/1/2015 | BAR | Pedroia | Demoted to reserve roster | | | Before |
| 7/1/2015 | BAR | Ramirez,JE | Demoted to reserve roster | | | Before |
| 7/1/2015 | BAR | Taylor,C | Promoted to active roster | | | Before |
| 7/1/2015 | CEN | Bedrosian | Demoted to reserve roster | | | Before |
| 7/1/2015 | CEN | Jimenez,U | Promoted to active roster | | | Before |
| 7/1/2015 | CIO | Martinez,C | Demoted to reserve roster | | | Before |
| 7/1/2015 | CIO | Warren | Promoted to active roster | | | Before |
| 7/1/2015 | CSS | Braun | Placed on Injured List | | 7/1/2015 | Before |
| 7/1/2015 | CSS | Myers | Promoted to active roster | | | Before |
| 7/1/2015 | GAR | Colon,C | Promoted to active roster | | | Before |
| 7/1/2015 | GAR | Elmore | Demoted to reserve roster | | | Before |
| 7/2/2015 | ANN | Plouffe | Promoted to active roster | | | Before |
| 7/2/2015 | CTW | Montgomery | Activated from Injured List | | | Before |
| 7/2/2015 | CTW | Montgomery | Demoted to reserve roster | | | Before |
| 7/2/2015 | DLM | Fister | Demoted to reserve roster | | | Before |
| 7/2/2015 | DLM | Lowe | Promoted to active roster | | | Before |
| 7/2/2015 | DLM | Niese | Promoted to active roster | | | Before |
| 7/2/2015 | DLM | Putnam | Demoted to reserve roster | | | Before |
| 7/3/2015 | GAR | Furbush | Promoted to active roster | | | Before |
| 7/3/2015 | GAR | O'Day | Demoted to reserve roster | | | Before |
| 7/3/2015 | HHR | Holliday | Demoted to reserve roster | | | Before |
| 7/3/2015 | HHR | Polanco,G | Promoted to active roster | | | Before |
| 7/3/2015 | RMO | Beckham,G | Demoted to reserve roster | | | Before |
| 7/3/2015 | RMO | Caminero | Demoted to reserve roster | | | Before |
| 7/3/2015 | RMO | Caminero | Promoted to active roster | | | Before |
| 7/3/2015 | RMO | Cosart | Demoted to reserve roster | | | Before |
| 7/3/2015 | RMO | Gray,S | Activated from Injured List | | | Before |
| 7/3/2015 | RMO | Moss | Promoted to active roster | | | Before |
| 7/3/2015 | RMO | Reynolds,Mar | Promoted to active roster | | | Before |
| 7/3/2015 | RMO | Walker,C | Demoted to reserve roster | | | Before |
| 7/7/2015 | BRK | Bourn | Demoted to reserve roster | | | Before |
| 7/7/2015 | BRK | Hedges | Demoted to reserve roster | | | Before |
| 7/7/2015 | BRK | Kendrick,K | Demoted to reserve roster | | | Before |
| 7/7/2015 | BRK | Kintzler | Promoted to active roster | | | Before |
| 7/7/2015 | BRK | Leon,S | Activated from Injured List | | | Before |
| 7/7/2015 | BRK | Rendon | Demoted to reserve roster | | | Before |
| 7/7/2015 | BRK | Sanchez,G | Promoted to active roster | | | Before |
| 7/7/2015 | BRK | Smoak | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Araujo | Demoted to reserve roster | | | Before |
| 7/7/2015 | CIN | Burnett | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Conley | Demoted to reserve roster | | | Before |
| 7/7/2015 | CIN | Goeddel | Demoted to reserve roster | | | Before |
| 7/7/2015 | CIN | Gonzalez,G | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Ramos,C | Demoted to reserve roster | | | Before |
| 7/7/2015 | CIN | Reimold | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Sanchez,An | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Socolovich | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Tomas | Demoted to reserve roster | | | Before |
| 7/7/2015 | CIN | Wilhelmsen | Promoted to active roster | | | Before |
| 7/7/2015 | CIN | Wood,T | Demoted to reserve roster | | | Before |
| 7/7/2015 | CSS | Cain,L | Placed on Injured List | | 7/3/2015 | Before |
| 7/7/2015 | CSS | Grossman | Promoted to active roster | | | Before |
| 7/7/2015 | RMO | Axford | Demoted to reserve roster | | | Before |
| 7/7/2015 | RMO | Gonzales | Promoted to active roster | | | Before |
| 7/8/2015 | GAR | Duffey | Promoted to active roster | | | Before |
| 7/8/2015 | GAR | Fiers | Placed on Injured List | | 7/8/2015 | Before |
| 7/9/2015 | GAR | Richards | Placed on Injured List | | 7/9/2015 | Before |
| 7/10/2015 | CEN | Feliz,N | Demoted to reserve roster | | | Before |
| 7/10/2015 | CEN | Lewis | Promoted to active roster | | | Before |
| 7/10/2015 | CIO | Casali | Demoted to reserve roster | | | Before |
| 7/10/2015 | CIO | Perez,R | Activated from Injured List | | | Before |
| 7/10/2015 | CSS | Gausman | Demoted to reserve roster | | | Before |
| 7/10/2015 | CSS | Happ | Promoted to active roster | | | Before |
| 7/10/2015 | GAR | Volquez | Promoted to active roster | | | Before |
| 7/10/2015 | SOI | Ackley | Demoted to reserve roster | | | Before |
| 7/10/2015 | SOI | Cole,G | Activated from Injured List | | | Before |
| 7/11/2015 | NEP | Flores,W | Placed on Injured List | | 7/11/2015 | Before |
| 7/11/2015 | NEP | Uribe | Promoted to active roster | | | Before |
| 7/12/2015 | CAR | de Aza | Demoted to reserve roster | | | Before |
| 7/12/2015 | CAR | Venable | Promoted to active roster | | | Before |
| 7/12/2015 | GAR | Pineda | Demoted to reserve roster | | | Before |
| 7/12/2015 | GAR | Verrett | Promoted to active roster | | | Before |
| 7/12/2015 | RMO | Caminero | Demoted to reserve roster | | | Before |
| 7/12/2015 | RMO | Iglesias,R | Activated from Injured List | | | Before |
| 7/14/2015 | ANN | Gomes,Y | Activated from Injured List | | | Before |
| 7/14/2015 | ANN | Hellickson | Activated from Injured List | | | Before |
| 7/14/2015 | ANN | Nuno | Demoted to reserve roster | | | Before |
| 7/14/2015 | ANN | Plawecki | Demoted to reserve roster | | | Before |
| 7/14/2015 | BRK | Albers,M | Promoted to active roster | | | Before |
| 7/14/2015 | BRK | Claudio | Promoted to active roster | | | Before |
| 7/14/2015 | BRK | Hughes,J | Demoted to reserve roster | | | Before |
| 7/14/2015 | BRK | Paxton | Demoted to reserve roster | | | Before |
| 7/14/2015 | CIO | Betances | Promoted to active roster | | | Before |
| 7/14/2015 | CIO | Blazek | Demoted to reserve roster | | | Before |
| 7/14/2015 | CTW | Anderson,Ch | Demoted to reserve roster | | | Before |
| 7/14/2015 | CTW | Marrero | Promoted to active roster | | | Before |
| 7/14/2015 | CTW | Nelson | Activated from Injured List | | | Before |
| 7/14/2015 | CTW | Pirela | Demoted to reserve roster | | | Before |
| 7/14/2015 | RMO | Beckham,G | Promoted to active roster | | | Before |
| 7/14/2015 | RMO | Breslow | Promoted to active roster | | | Before |
| 7/14/2015 | RMO | Caminero | Promoted to active roster | | | Before |
| 7/14/2015 | RMO | Cosart | Promoted to active roster | | | Before |
| 7/14/2015 | RMO | Cron | Demoted to reserve roster | | | Before |
| 7/14/2015 | RMO | Gonzales | Demoted to reserve roster | | | Before |
| 7/14/2015 | RMO | Jansen | Demoted to reserve roster | | | Before |
| 7/14/2015 | RMO | Moss | Demoted to reserve roster | | | Before |
| 7/15/2015 | BBG | Quackenbush | Promoted to active roster | | | Before |
| 7/15/2015 | BBG | Smith,Joe | Placed on Injured List | | 7/15/2015 | Before |
| 7/15/2015 | CTW | Delgado | Demoted to reserve roster | | | Before |
| 7/15/2015 | CTW | Nava | Promoted to active roster | | | Before |
| 7/15/2015 | CTW | Santana,Do | Demoted to reserve roster | | | Before |
| 7/15/2015 | CTW | Williams,Je | Promoted to active roster | | | Before |
| 7/15/2015 | NEP | Fields,J | Demoted to reserve roster | | | Before |
| 7/15/2015 | NEP | Morales,F | Promoted to active roster | | | Before |
| 7/15/2015 | SOI | Avila | Activated from Injured List | | | Before |
| 7/15/2015 | SOI | Avila | Demoted to reserve roster | | | Before |
| 7/15/2015 | SOI | Bass | Promoted to active roster | | | Before |
| 7/15/2015 | SOI | Lincecum | Demoted to reserve roster | | | Before |
| 7/15/2015 | SOI | McGehee | Promoted to active roster | | | Before |
| 7/15/2015 | SOI | Montas | Demoted to reserve roster | | | Before |
| 7/16/2015 | CTW | Hutchison | Promoted to active roster | | | Before |
| 7/16/2015 | CTW | Tuivailala | Demoted to reserve roster | | | Before |
| 7/17/2015 | CTW | Swarzak | Demoted to reserve roster | | | Before |
| 7/17/2015 | RMO | Badenhop | Demoted to reserve roster | | | Before |
| 7/17/2015 | RMO | Badenhop | Promoted to active roster | | | Before |
| 7/17/2015 | RMO | de la Rosa,R | Promoted to active roster | | | Before |
| 7/17/2015 | RMO | Garcia,Av | Placed on Injured List | | 7/17/2015 | Before |
| 7/17/2015 | RMO | Moss | Promoted to active roster | | | Before |
| 7/17/2015 | RMO | Ruiz | Demoted to reserve roster | | | Before |
| 7/17/2015 | RMO | Stewart | Promoted to active roster | | | Before |
| 7/17/2015 | RMO | Urena | Placed on Injured List | | 7/17/2015 | Before |
| 7/18/2015 | CTW | Ceciliani | Promoted to active roster | | | Before |
| 7/18/2015 | GAR | McGee | Demoted to reserve roster | | | Before |
| 7/18/2015 | GAR | Siegrist | Promoted to active roster | | | Before |
| 7/18/2015 | TEW | Baez,P | Demoted to reserve roster | | | Before |
| 7/18/2015 | TEW | Foltynewicz | Demoted to reserve roster | | | Before |
| 7/18/2015 | TEW | Koehler | Activated from Injured List | | | Before |
| 7/18/2015 | TEW | Robles | Activated from Injured List | | | Before |
| 7/19/2015 | BBG | Feldman | Promoted to active roster | | | Before |
| 7/19/2015 | BBG | Pelfrey | Demoted to reserve roster | | | Before |
| 7/19/2015 | BRK | Aviles | Placed on Injured List | | 7/18/2015 | Before |
| 7/19/2015 | BRK | Baez,J | Promoted to active roster | | | Before |
| 7/19/2015 | BRK | Hardy,J | Promoted to active roster | | | Before |
| 7/19/2015 | BRK | Leon,S | Demoted to reserve roster | | | Before |
| 7/19/2015 | BRK | Sogard | Demoted to reserve roster | | | Before |
| 7/19/2015 | BRK | Stassi | Promoted to active roster | | | Before |
| 7/19/2015 | CIO | Martinez,C | Promoted to active roster | | | Before |
| 7/19/2015 | CIO | Tomlin | Demoted to reserve roster | | | Before |
| 7/19/2015 | CSS | Grossman | Demoted to reserve roster | | | Before |
| 7/19/2015 | NEP | Kelley | Activated from Injured List | | | Before |
| 7/19/2015 | NEP | Wilson,A | Demoted to reserve roster | | | Before |
| 7/19/2015 | NYD | Gott | Demoted to reserve roster | | | Before |
| 7/19/2015 | NYD | Heaney | Promoted to active roster | | | Before |
| 7/19/2015 | NYD | Hinojosa | Promoted to active roster | | | Before |
| 7/19/2015 | NYD | Phelps | Demoted to reserve roster | | | Before |
| 7/20/2015 | ANN | Fernandez | Demoted to reserve roster | | | Before |
| 7/20/2015 | ANN | Maldonado | Placed on Injured List | | 7/20/2015 | Before |
| 7/20/2015 | ANN | Nuno | Promoted to active roster | | | Before |
| 7/20/2015 | ANN | Plawecki | Promoted to active roster | | | Before |
| 7/20/2015 | BAR | Finnegan | Promoted to active roster | | | Before |
| 7/20/2015 | BAR | Wacha | Placed on Injured List | | 7/20/2015 | Before |
| 7/20/2015 | CSS | Beckham,T | Promoted to active roster | | | Before |
| 7/20/2015 | CSS | Maybin | Promoted to active roster | | | Before |
| 7/20/2015 | CSS | Rodriguez,S | Demoted to reserve roster | | | Before |
| 7/20/2015 | NEP | Almonte,A | Demoted to reserve roster | | | Before |
| 7/20/2015 | NEP | Colabello | Placed on Injured List | | 7/20/2015 | Before |
| 7/20/2015 | NEP | Conforto | Promoted to active roster | | | Before |
| 7/20/2015 | NEP | Jackson,A | Demoted to reserve roster | | | Before |
| 7/20/2015 | NEP | Parker,J | Promoted to active roster | | | Before |
| 7/20/2015 | NEP | Peavy | Demoted to reserve roster | | | Before |
| 7/20/2015 | NEP | Ramirez,E | Promoted to active roster | | | Before |
| 7/20/2015 | NEP | Ruggiano | Promoted to active roster | | | Before |
| 7/21/2015 | BRK | Baez,J | Demoted to reserve roster | | | Before |
| 7/21/2015 | BRK | Bourn | Promoted to active roster | | | Before |
| 7/21/2015 | BRK | Infante | Promoted to active roster | | | Before |
| 7/21/2015 | BRK | Stanton | Demoted to reserve roster | | | Before |
| 7/21/2015 | CSS | Broxton,J | Promoted to active roster | | | Before |
| 7/21/2015 | CSS | Reed,A | Demoted to reserve roster | | | Before |
| 7/21/2015 | HAR | Ottavino | Promoted to active roster | | | Before |
| 7/21/2015 | HAR | Roark | Demoted to reserve roster | | | Before |
| 7/21/2015 | HAR | Sanchez,Aa | Placed on Injured List | | 7/20/2015 | Before |
| 7/21/2015 | HAR | Ventura | Promoted to active roster | | | Before |
| 7/23/2015 | BRK | Barnes,M | Promoted to active roster | | | Before |
| 7/23/2015 | BRK | Kintzler | Demoted to reserve roster | | | Before |
| 7/23/2015 | CSS | Braun | Activated from Injured List | | | Before |
| 7/23/2015 | CSS | Springer | Demoted to reserve roster | | | Before |
| 7/23/2015 | CTW | Neshek | Demoted to reserve roster | | | Before |
| 7/23/2015 | CTW | Verlander | Promoted to active roster | | | Before |
| 7/23/2015 | SOI | O'Flaherty | Promoted to active roster | | | Before |
| 7/23/2015 | SOI | Pressly | Demoted to reserve roster | | | Before |
| 7/24/2015 | CIN | Burnett | Demoted to reserve roster | | | Before |
| 7/24/2015 | CIN | Conley | Promoted to active roster | | | Before |
| 7/24/2015 | CIN | Goeddel | Promoted to active roster | | | Before |
| 7/24/2015 | CIN | Sanchez,An | Demoted to reserve roster | | | Before |
| 7/24/2015 | CIN | Socolovich | Demoted to reserve roster | | | Before |
| 7/24/2015 | CIN | Wood,T | Promoted to active roster | | | Before |
| 7/24/2015 | CTW | Callaspo | Promoted to active roster | | | Before |
| 7/24/2015 | CTW | Difo | Demoted to reserve roster | | | Before |
| 7/24/2015 | GAR | Fiers | Activated from Injured List | | | Before |
| 7/24/2015 | GAR | Volquez | Demoted to reserve roster | | | Before |
| 7/24/2015 | HHR | Grichuk | Demoted to reserve roster | | | Before |
| 7/25/2015 | BRK | Greene | Promoted to active roster | | | Before |
| 7/25/2015 | BRK | Morrow | Promoted to active roster | | | Before |
| 7/25/2015 | BRK | Petit,Y | Demoted to reserve roster | | | Before |
| 7/25/2015 | BRK | Rivero | Demoted to reserve roster | | | Before |
| 7/25/2015 | BRK | Rusin | Demoted to reserve roster | | | Before |
| 7/25/2015 | BRK | Vizcaino | Promoted to active roster | | | Before |
| 7/25/2015 | CIN | Velasquez | Promoted to active roster | | | Before |
| 7/25/2015 | CIN | Wilhelmsen | Placed on Injured List | | 7/24/2015 | Before |
| 7/25/2015 | CSS | Cain,L | Activated from Injured List | | | Before |
| 7/25/2015 | CSS | Maybin | Demoted to reserve roster | | | Before |
| 7/26/2015 | CAR | Caminero | Acquired via trade | RMO | | After |
| 7/26/2015 | CAR | Colon,B | Acquired via trade | SOI | | After |
| 7/26/2015 | CAR | Hudson,D | Traded away | RMO | | After |
| 7/26/2015 | CEN | Barney | Demoted to reserve roster | | | Before |
| 7/26/2015 | CEN | Villar | Promoted to active roster | | | Before |
| 7/26/2015 | RMO | Caminero | Traded away | CAR | | After |
| 7/26/2015 | RMO | Haren | Acquired via trade | SOI | | After |
| 7/26/2015 | RMO | Hudson,D | Acquired via trade | CAR | | After |
| 7/26/2015 | SOI | Colon,B | Traded away | CAR | | After |
| 7/26/2015 | SOI | Haren | Traded away | RMO | | After |
| 7/27/2015 | CAR | Bassitt | Demoted to reserve roster | | | Before |
| 7/27/2015 | CAR | Bassitt | Promoted to active roster | | | Before |
| 7/27/2015 | CAR | Colon,B | Promoted to active roster | | | Before |
| 7/27/2015 | CAR | DeSclafani | Demoted to reserve roster | | | Before |
| 7/27/2015 | CAR | Wilson,C | Demoted to reserve roster | | | Before |
| 7/27/2015 | CAR | Wilson,Ju | Demoted to reserve roster | | | Before |
| 7/27/2015 | CAR | Wilson,Ju | Promoted to active roster | | | Before |
| 7/27/2015 | RMO | Hudson,D | Promoted to active roster | | | Before |
| 7/28/2015 | BAR | Diaz,Ja | Promoted to active roster | | | Before |
| 7/28/2015 | BAR | Miller,J | Demoted to reserve roster | | | Before |
| 7/28/2015 | BAR | Romo | Promoted to active roster | | | Before |
| 7/28/2015 | BAR | Soria | Demoted to reserve roster | | | Before |
| 7/28/2015 | BAR | Wright,S | Demoted to reserve roster | | | Before |
| 7/28/2015 | BRK | Mathis | Promoted to active roster | | | Before |
| 7/28/2015 | BRK | Stassi | Demoted to reserve roster | | | Before |
| 7/28/2015 | CAR | Butera | Promoted to active roster | | | Before |
| 7/28/2015 | CAR | McKenry | Demoted to reserve roster | | | Before |
| 7/28/2015 | HHR | Aybar | Promoted to active roster | | | Before |
| 7/28/2015 | SOI | Detwiler | Promoted to active roster | | | Before |
| 7/28/2015 | SOI | Hendriks | Demoted to reserve roster | | | Before |
| 7/28/2015 | SOI | Hunter,Tom | Promoted to active roster | | | Before |
| 7/28/2015 | SOI | Treinen | Demoted to reserve roster | | | Before |
| 7/29/2015 | ANN | Bundy (AG) | Traded away | NEP | | After |
| 7/29/2015 | ANN | Milone | Traded away | NEP | | After |
| 7/29/2015 | BAR | Barrett | Promoted to active roster | | | Before |
| 7/29/2015 | BRK | Lohse | Promoted to active roster | | | Before |
| 7/29/2015 | BRK | Sanchez,G | Demoted to reserve roster | | | Before |
| 7/29/2015 | CSS | Myers | Demoted to reserve roster | | | Before |
| 7/29/2015 | CSS | Myers | Promoted to active roster | | | Before |
| 7/29/2015 | DLM | Crawford,B | Demoted to reserve roster | | | Before |
| 7/29/2015 | DLM | Duke | Demoted to reserve roster | | | Before |
| 7/29/2015 | DLM | Franklin | Promoted to active roster | | | Before |
| 7/29/2015 | DLM | Garneau | Promoted to active roster | | | Before |
| 7/29/2015 | DLM | Morse | Promoted to active roster | | | Before |
| 7/29/2015 | DLM | Simon | Promoted to active roster | | | Before |
| 7/29/2015 | DLM | Smith,S | Demoted to reserve roster | | | Before |
| 7/29/2015 | DLM | Span | Demoted to reserve roster | | | Before |
| 7/29/2015 | NEP | Jackson,E | Demoted to reserve roster | | | Before |
| 7/29/2015 | NEP | Wilson,A | Promoted to active roster | | | Before |
| 7/29/2015 | NEP | Bundy (AG) | Acquired via trade | ANN | | After |
| 7/29/2015 | NEP | Milone | Acquired via trade | ANN | | After |
| 7/30/2015 | GAR | Dickerson,C | Demoted to reserve roster | | | Before |
| 7/30/2015 | GAR | Hayes | Promoted to active roster | | | Before |
| 7/30/2015 | HHR | deGrom | Activated from Injured List | | | Before |
| 7/30/2015 | HHR | Garcia,Jai | Demoted to reserve roster | | | Before |
| 7/31/2015 | BAR | Grimm | Acquired via trade | FDH | | After |
| 7/31/2015 | BAR | Hernandez,F | Acquired via trade | FDH | | After |
| 7/31/2015 | BAR | Matusz | Traded away | FDH | | After |
| 7/31/2015 | BAR | O'Malley | Acquired via trade | FDH | | After |
| 7/31/2015 | BAR | Soria | Traded away | FDH | | After |
| 7/31/2015 | BAR | Wood,T | Acquired via trade | CIN | | After |
| 7/31/2015 | BBG | Hughes,P | Promoted to active roster | | | Before |
| 7/31/2015 | BBG | Santiago | Demoted to reserve roster | | | Before |
| 7/31/2015 | BRK | Norris,B | Acquired via trade | CSS | | After |
| 7/31/2015 | BRK | Stassi | Traded away | CSS | | After |
| 7/31/2015 | CAR | Thole | Promoted to active roster | | | Before |
| 7/31/2015 | CAR | Venable | Placed on Injured List | | 7/31/2015 | Before |
| 7/31/2015 | CAR | Cuddyer | Acquired via trade | TEW | | After |
| 7/31/2015 | CEN | Cishek | Demoted to reserve roster | | | Before |
| 7/31/2015 | CEN | Neris | Demoted to reserve roster | | | Before |
| 7/31/2015 | CEN | Neris | Promoted to active roster | | | Before |
| 7/31/2015 | CEN | Norris,Da | Promoted to active roster | | | Before |
| 7/31/2015 | CEN | Porcello | Demoted to reserve roster | | | Before |
| 7/31/2015 | CEN | Porcello | Promoted to active roster | | | Before |
| 7/31/2015 | CEN | Dickey | Traded away | NEP | | After |
| 7/31/2015 | CEN | Peavy | Acquired via trade | NEP | | After |
| 7/31/2015 | CIN | Martinez,N | Acquired via trade | CTW | | After |
| 7/31/2015 | CIN | Wood,T | Traded away | BAR | | After |
| 7/31/2015 | CIO | Capps | Promoted to active roster | | | Before |
| 7/31/2015 | CIO | Rodriguez,Fr | Demoted to reserve roster | | | Before |
| 7/31/2015 | CSS | Norris,B | Traded away | BRK | | After |
| 7/31/2015 | CSS | Stassi | Acquired via trade | BRK | | After |
| 7/31/2015 | CTW | Martinez,N | Traded away | CIN | | After |
| 7/31/2015 | FDH | Grimm | Traded away | BAR | | After |
| 7/31/2015 | FDH | Hernandez,F | Traded away | BAR | | After |
| 7/31/2015 | FDH | Matusz | Acquired via trade | BAR | | After |
| 7/31/2015 | FDH | O'Malley | Traded away | BAR | | After |
| 7/31/2015 | FDH | Soria | Acquired via trade | BAR | | After |
| 7/31/2015 | NEP | Miller,B | Placed on Injured List | | 7/31/2015 | Before |
| 7/31/2015 | NEP | Dickey | Acquired via trade | CEN | | After |
| 7/31/2015 | NEP | Peavy | Traded away | CEN | | After |
| 7/31/2015 | NYD | Cozart | Demoted to reserve roster | | | Before |
| 7/31/2015 | NYD | Ynoa | Promoted to active roster | | | Before |
| 7/31/2015 | TEW | Collmenter | Promoted to active roster | | | Before |
| 7/31/2015 | TEW | Gallardo | Promoted to active roster | | | Before |
| 7/31/2015 | TEW | Geltz | Demoted to reserve roster | | | Before |
| 7/31/2015 | TEW | Janssen | Promoted to active roster | | | Before |
| 7/31/2015 | TEW | Kontos | Demoted to reserve roster | | | Before |
| 7/31/2015 | TEW | Rodon | Demoted to reserve roster | | | Before |
| 7/31/2015 | TEW | Cuddyer | Traded away | CAR | | After |
| 8/1/2015 | BAR | Barrett | Demoted to reserve roster | | | Before |
| 8/1/2015 | BAR | Grimm | Demoted to reserve roster | | | Before |
| 8/1/2015 | CEN | Peavy | Promoted to active roster | | | Before |
| 8/1/2015 | CIN | Burnett | Promoted to active roster | | | Before |
| 8/1/2015 | CIN | Conley | Demoted to reserve roster | | | Before |
| 8/1/2015 | CIN | Goeddel | Demoted to reserve roster | | | Before |
| 8/1/2015 | CIN | Gonzalez,G | Demoted to reserve roster | | | Before |
| 8/1/2015 | CIN | Hoover | Promoted to active roster | | | Before |
| 8/1/2015 | CIN | Sanchez,An | Promoted to active roster | | | Before |
| 8/1/2015 | CIN | Wood,T | Demoted to reserve roster | | | Before |
| 8/1/2015 | CTW | Anderson,Ch | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Bastardo | Demoted to reserve roster | | | Before |
| 8/1/2015 | FDH | Benoit | Demoted to reserve roster | | | Before |
| 8/1/2015 | FDH | Liberatore | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | McHugh | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Medlen | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Morgan | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Nicolino | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Rodriguez,Fe | Demoted to reserve roster | | | Before |
| 8/1/2015 | FDH | Schultz | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Soria | Promoted to active roster | | | Before |
| 8/1/2015 | FDH | Strasburg | Demoted to reserve roster | | | Before |
| 8/1/2015 | FDH | Strop | Demoted to reserve roster | | | Before |
| 8/1/2015 | NEP | Bour | Promoted to active roster | | | Before |
| 8/1/2015 | NEP | Dietrich | Placed on Injured List | | 7/31/2015 | Before |
| 8/1/2015 | NEP | Gosselin | Promoted to active roster | | | Before |
| 8/1/2015 | NEP | Guyer | Promoted to active roster | | | Before |
| 8/1/2015 | NEP | Miley | Demoted to reserve roster | | | Before |
| 8/1/2015 | NEP | Milone | Promoted to active roster | | | Before |
| 8/1/2015 | NEP | Moreland | Demoted to reserve roster | | | Before |
| 8/1/2015 | NEP | Tanaka | Demoted to reserve roster | | | Before |
| 8/1/2015 | RMO | Garcia,Av | Activated from Injured List | | | Before |
| 8/1/2015 | RMO | Moss | Demoted to reserve roster | | | Before |
| 8/2/2015 | NEP | Almonte,A | Promoted to active roster | | | Before |
| 8/2/2015 | NEP | Fields,J | Promoted to active roster | | | Before |
| 8/2/2015 | NEP | Jackson,A | Promoted to active roster | | | Before |
| 8/2/2015 | NEP | Kelley | Demoted to reserve roster | | | Before |
| 8/2/2015 | NEP | Parker,J | Demoted to reserve roster | | | Before |
| 8/2/2015 | NEP | Seager,C | Activated from Injured List | | | Before |
| 8/2/2015 | NEP | Seager,C | Demoted to reserve roster | | | Before |
| 8/3/2015 | GAR | Dickerson,C | Promoted to active roster | | | Before |
| 8/3/2015 | GAR | Hayes | Demoted to reserve roster | | | Before |
| 8/3/2015 | HAR | Liriano | Placed on Injured List | | 7/31/2015 | Before |
| 8/3/2015 | NEP | Jackson,A | Demoted to reserve roster | | | Before |
| 8/3/2015 | SOI | Lowrie | Demoted to reserve roster | | | Before |
| 8/3/2015 | SOI | Middlebrooks | Promoted to active roster | | | Before |
| 8/3/2015 | SOI | Rosario,E | Demoted to reserve roster | | | Before |
| 8/3/2015 | SOI | Swisher | Promoted to active roster | | | Before |
| 8/4/2015 | GAR | Duffey | Demoted to reserve roster | | | Before |
| 8/4/2015 | GAR | Pineda | Promoted to active roster | | | Before |
| 8/4/2015 | NEP | Colabello | Activated from Injured List | | | Before |
| 8/4/2015 | NEP | Conforto | Demoted to reserve roster | | | Before |
| 8/4/2015 | NEP | Jackson,A | Promoted to active roster | | | Before |
| 8/4/2015 | NEP | Ruggiano | Demoted to reserve roster | | | Before |
| 8/5/2015 | BAR | Finnegan | Demoted to reserve roster | | | Before |
| 8/5/2015 | BAR | Wacha | Activated from Injured List | | | Before |
| 8/5/2015 | BBG | Johnson,K | Placed on Injured List | | 8/3/2015 | Before |
| 8/5/2015 | BBG | Polanco,J | Promoted to active roster | | | Before |
| 8/5/2015 | BBG | Quackenbush | Demoted to reserve roster | | | Before |
| 8/5/2015 | BBG | Quackenbush | Promoted to active roster | | | Before |
| 8/5/2015 | CAR | Cuddyer | Promoted to active roster | | | Before |
| 8/5/2015 | CAR | de Aza | Promoted to active roster | | | Before |
| 8/5/2015 | CAR | DeSclafani | Promoted to active roster | | | Before |
| 8/5/2015 | CAR | Johnson,C | Demoted to reserve roster | | | Before |
| 8/5/2015 | CAR | Osich | Promoted to active roster | | | Before |
| 8/5/2015 | CAR | Puig | Demoted to reserve roster | | | Before |
| 8/5/2015 | CAR | Ross,J | Demoted to reserve roster | | | Before |
| 8/5/2015 | CAR | Thole | Demoted to reserve roster | | | Before |
| 8/5/2015 | GAR | Papelbon | Demoted to reserve roster | | | Before |
| 8/5/2015 | GAR | Storen | Promoted to active roster | | | Before |
| 8/6/2015 | ANN | Boyd | Demoted to reserve roster | | | Before |
| 8/6/2015 | ANN | Boyer | Promoted to active roster | | | Before |
| 8/6/2015 | ANN | Harang | Promoted to active roster | | | Before |
| 8/6/2015 | ANN | Rodriguez,E | Demoted to reserve roster | | | Before |
| 8/6/2015 | HAR | Cabrera,Mi | Demoted to reserve roster | | | Before |
| 8/6/2015 | HAR | Casilla | Promoted to active roster | | | Before |
| 8/6/2015 | HAR | Garcia,Ad | Promoted to active roster | | | Before |
| 8/6/2015 | HAR | Gillespie | Promoted to active roster | | | Before |
| 8/6/2015 | HAR | Hanigan | Demoted to reserve roster | | | Before |
| 8/6/2015 | HAR | Mahtook | Promoted to active roster | | | Before |
| 8/6/2015 | HAR | Navarro,D | Activated from Injured List | | | Before |
| 8/6/2015 | HAR | Pearce | Promoted to active roster | | | Before |
| 8/6/2015 | HAR | Piscotty | Demoted to reserve roster | | | Before |
| 8/6/2015 | HAR | Smith,Ca | Demoted to reserve roster | | | Before |
| 8/6/2015 | HAR | Thornton | Promoted to active roster | | | Before |
| 8/6/2015 | HAR | Wright,D | Demoted to reserve roster | | | Before |
| 8/6/2015 | HAR | Zimmerman | Demoted to reserve roster | | | Before |
| 8/8/2015 | BBG | Burns | Placed on Injured List | | 8/6/2015 | Before |
| 8/8/2015 | BBG | Peterson,S | Promoted to active roster | | | Before |
| 8/8/2015 | BRK | Martin,Ch | Promoted to active roster | | | Before |
| 8/8/2015 | BRK | Ray | Demoted to reserve roster | | | Before |
| 8/8/2015 | CAR | Johnson,C | Promoted to active roster | | | Before |
| 8/8/2015 | CAR | Osich | Demoted to reserve roster | | | Before |
| 8/8/2015 | CEN | Neris | Promoted to active roster | | | Before |
| 8/8/2015 | CEN | Odorizzi | Placed on Injured List | | 8/4/2015 | Before |
| 8/8/2015 | CIN | Araujo | Promoted to active roster | | | Before |
| 8/8/2015 | CIN | Martinez,N | Demoted to reserve roster | | | Before |
| 8/8/2015 | CSS | Maness | Promoted to active roster | | | Before |
| 8/8/2015 | CSS | Torres,C | Demoted to reserve roster | | | Before |
| 8/8/2015 | DLM | Lucroy | Placed on Injured List | | 8/6/2015 | Before |
| 8/8/2015 | RMO | Gray,S | Placed on Injured List | | 8/6/2015 | Before |
| 8/9/2015 | ANN | Maldonado | Activated from Injured List | | | Before |
| 8/9/2015 | ANN | Plawecki | Demoted to reserve roster | | | Before |
| 8/9/2015 | BAR | Gregerson | Placed on Injured List | | 8/9/2015 | Before |
| 8/9/2015 | BAR | Grimm | Promoted to active roster | | | Before |
| 8/9/2015 | GAR | Richards | Activated from Injured List | | | Before |
| 8/9/2015 | GAR | Verrett | Demoted to reserve roster | | | Before |
| 8/10/2015 | CIN | Gonzalez,G | Promoted to active roster | | | Before |
| 8/10/2015 | CIN | Velasquez | Demoted to reserve roster | | | Before |
| 8/10/2015 | GAR | Bracho | Promoted to active roster | | | Before |
| 8/10/2015 | GAR | Madson | Demoted to reserve roster | | | Before |
| 8/10/2015 | HAR | Ottavino | Demoted to reserve roster | | | Before |
| 8/10/2015 | HAR | Sanchez,Aa | Activated from Injured List | | | Before |
| 8/11/2015 | BRK | Aviles | Activated from Injured List | | | Before |
| 8/11/2015 | BRK | Correa | Demoted to reserve roster | | | Before |
| 8/11/2015 | BRK | Kendrick,K | Promoted to active roster | | | Before |
| 8/11/2015 | BRK | Santana,E | Demoted to reserve roster | | | Before |
| 8/11/2015 | FDH | Schumaker | Promoted to active roster | | | Before |
| 8/11/2015 | FDH | Zobrist | Demoted to reserve roster | | | Before |
| 8/11/2015 | NEP | Bour | Placed on Injured List | | 8/10/2015 | Before |
| 8/11/2015 | NEP | Moreland | Promoted to active roster | | | Before |
| 8/11/2015 | NYD | Cabrera,R | Promoted to active roster | | | Before |
| 8/11/2015 | NYD | Ellis | Demoted to reserve roster | | | Before |
| 8/12/2015 | BAR | Blanks | Promoted to active roster | | | Before |
| 8/12/2015 | BAR | Tepera | Demoted to reserve roster | | | Before |
| 8/12/2015 | BBG | Pomeranz | Demoted to reserve roster | | | Before |
| 8/12/2015 | BBG | Quackenbush | Demoted to reserve roster | | | Before |
| 8/12/2015 | BBG | Ross,R | Promoted to active roster | | | Before |
| 8/12/2015 | BBG | Smith,Joe | Activated from Injured List | | | Before |
| 8/12/2015 | CEN | Cishek | Promoted to active roster | | | Before |
| 8/12/2015 | CEN | Jennings,Da | Demoted to reserve roster | | | Before |
| 8/12/2015 | CIN | Freeman,F | Placed on Injured List | | 8/12/2015 | Before |
| 8/12/2015 | CIN | Hamilton,J | Promoted to active roster | | | Before |
| 8/12/2015 | NEP | Kelley | Promoted to active roster | | | Before |
| 8/12/2015 | NEP | Lynn | Demoted to reserve roster | | | Before |
| 8/12/2015 | NEP | Matz | Promoted to active roster | | | Before |
| 8/12/2015 | NEP | Wilson,A | Demoted to reserve roster | | | Before |
| 8/12/2015 | NYD | Anderson,Co | Promoted to active roster | | | Before |
| 8/12/2015 | NYD | Young,CR | Demoted to reserve roster | | | Before |
| 8/13/2015 | SOI | Oberg | Demoted to reserve roster | | | Before |
| 8/13/2015 | SOI | Stammen | Promoted to active roster | | | Before |
| 8/14/2015 | ANN | Butler,B | Promoted to active roster | | | Before |
| 8/14/2015 | ANN | Souza | Demoted to reserve roster | | | Before |
| 8/14/2015 | BRK | Hamilton,B | Promoted to active roster | | | Before |
| 8/14/2015 | BRK | Kennedy | Demoted to reserve roster | | | Before |
| 8/14/2015 | CAR | Bassitt | Promoted to active roster | | | Before |
| 8/14/2015 | CAR | DeSclafani | Demoted to reserve roster | | | Before |
| 8/14/2015 | CSS | Flaherty | Promoted to active roster | | | Before |
| 8/14/2015 | CSS | Hernandez,E | Demoted to reserve roster | | | Before |
| 8/14/2015 | CSS | Maybin | Promoted to active roster | | | Before |
| 8/14/2015 | CSS | Ramirez,H | Demoted to reserve roster | | | Before |
| 8/15/2015 | BAR | Grimm | Demoted to reserve roster | | | Before |
| 8/15/2015 | BAR | Thielbar | Promoted to active roster | | | Before |
| 8/15/2015 | BBG | Bandy | Promoted to active roster | | | Before |
| 8/15/2015 | BBG | Polanco,J | Demoted to reserve roster | | | Before |
| 8/15/2015 | CIN | Drury | Demoted to reserve roster | | | Before |
| 8/15/2015 | CIN | Paredes | Promoted to active roster | | | Before |
| 8/15/2015 | CIO | Warren | Demoted to reserve roster | | | Before |
| 8/15/2015 | CSS | Alexander | Promoted to active roster | | | Before |
| 8/15/2015 | CSS | Herrera,K | Demoted to reserve roster | | | Before |
| 8/15/2015 | DLM | Britton | Demoted to reserve roster | | | Before |
| 8/15/2015 | DLM | Garcia,G | Demoted to reserve roster | | | Before |
| 8/15/2015 | DLM | LaRoche | Promoted to active roster | | | Before |
| 8/15/2015 | DLM | Murphy,Dav | Promoted to active roster | | | Before |
| 8/15/2015 | DLM | Perez,W | Promoted to active roster | | | Before |
| 8/15/2015 | DLM | Ramirez,Ar | Promoted to active roster | | | Before |
| 8/15/2015 | DLM | Ramos,A | Demoted to reserve roster | | | Before |
| 8/15/2015 | DLM | Solarte | Demoted to reserve roster | | | Before |
| 8/15/2015 | DLM | Vogelsong | Promoted to active roster | | | Before |
| 8/15/2015 | GAR | Furbush | Demoted to reserve roster | | | Before |
| 8/15/2015 | GAR | O'Day | Promoted to active roster | | | Before |
| 8/15/2015 | NEP | Ahmed | Demoted to reserve roster | | | Before |
| 8/15/2015 | NEP | Dietrich | Activated from Injured List | | | Before |
| 8/15/2015 | NEP | Flores,W | Activated from Injured List | | | Before |
| 8/15/2015 | NEP | Gosselin | Demoted to reserve roster | | | Before |
| 8/15/2015 | NEP | Miller,B | Activated from Injured List | | | Before |
| 8/15/2015 | NEP | Uribe | Demoted to reserve roster | | | Before |
| 8/15/2015 | RMO | Badenhop | Promoted to active roster | | | Before |
| 8/15/2015 | RMO | Cruz,T | Promoted to active roster | | | Before |
| 8/15/2015 | RMO | De Fratus | Promoted to active roster | | | Before |
| 8/15/2015 | RMO | Gosewisch | Demoted to reserve roster | | | Before |
| 8/15/2015 | RMO | Hammel | Demoted to reserve roster | | | Before |
| 8/15/2015 | RMO | Haren | Promoted to active roster | | | Before |
| 8/15/2015 | RMO | Iglesias,R | Demoted to reserve roster | | | Before |
| 8/15/2015 | RMO | Rodney | Demoted to reserve roster | | | Before |
| 8/15/2015 | RMO | Urena | Activated from Injured List | | | Before |
| 8/16/2015 | BRK | Alonso | Demoted to reserve roster | | | Before |
| 8/16/2015 | BRK | Buxton | Promoted to active roster | | | Before |
| 8/16/2015 | BRK | Cashner | Demoted to reserve roster | | | Before |
| 8/16/2015 | BRK | Hedges | Promoted to active roster | | | Before |
| 8/16/2015 | BRK | Hughes,J | Promoted to active roster | | | Before |
| 8/16/2015 | BRK | Ozuna | Demoted to reserve roster | | | Before |
| 8/16/2015 | CAR | Amarista | Promoted to active roster | | | Before |
| 8/16/2015 | CAR | Caminero | Demoted to reserve roster | | | Before |
| 8/16/2015 | CIN | Hoover | Demoted to reserve roster | | | Before |
| 8/16/2015 | CIN | Martinez,N | Promoted to active roster | | | Before |
| 8/16/2015 | CIN | Parra,M | Demoted to reserve roster | | | Before |
| 8/16/2015 | CIN | Wilhelmsen | Activated from Injured List | | | Before |
| 8/16/2015 | CIO | Jungmann | Promoted to active roster | | | Before |
| 8/16/2015 | CSS | Alexander | Demoted to reserve roster | | | Before |
| 8/16/2015 | NYD | Castro,D | Promoted to active roster | | | Before |
| 8/16/2015 | NYD | Schebler | Demoted to reserve roster | | | Before |