Red Sox Roster & Staff
Transactions
| Date | Transaction |
| 12/21/15 | Brock Holt changed number to 12. |
| 12/15/15 | Boston Red Sox signed free agent RHP Anthony Varvaro to a minor league contract and invited him to spring training. |
| 12/14/15 | Boston Red Sox signed free agent C Ali Solis to a minor league contract and invited him to spring training. |
| 12/14/15 | Boston Red Sox signed free agent 3B Chris Dominguez to a minor league contract and invited him to spring training. |
| 12/14/15 | Boston Red Sox signed free agent CF Ryan LaMarre to a minor league contract and invited him to spring training. |
| 12/12/15 | Boston Red Sox signed free agent LF Rainel Rosario to a minor league contract. |
| 12/11/15 | Boston Red Sox traded C Zach Kapstein to Baltimore Orioles for cash. |
| 12/10/15 | Boston Red Sox traded 3B Garin Cecchini to Milwaukee Brewers for cash. |
| 12/07/15 | Boston Red Sox traded RHP Jonathan Aro and LHP Wade Miley to Seattle Mariners for RHP Carson Smith and LHP Roenis Elias. |
| 12/07/15 | Boston Red Sox traded RHP Jonathan Aro and LHP Wade Miley to Seattle Mariners for RHP Carson Smith and LHP Roenis Elias. |
| 12/07/15 | Boston Red Sox traded RHP Jonathan Aro and LHP Wade Miley to Seattle Mariners for RHP Carson Smith and LHP Roenis Elias. |
| 12/07/15 | Boston Red Sox sent RHP Roman Mendez outright to Pawtucket Red Sox. |
| 12/07/15 | Boston Red Sox traded RHP Jonathan Aro and LHP Wade Miley to Seattle Mariners for RHP Carson Smith and LHP Roenis Elias. |
| 12/04/15 | Boston Red Sox signed free agent LHP David Price. |
| 12/04/15 | Boston Red Sox designated Garin Cecchini for assignment. |
| 12/02/15 | Boston Red Sox signed free agent RHP Sean O'Sullivan to a minor league contract and invited him to spring training. |
| 12/02/15 | Boston Red Sox designated Roman Mendez for assignment. |
| 12/02/15 | Boston Red Sox signed free agent LF Chris Young. |