Red Sox Roster & Staff
Transactions
| Date | Transaction |
| 08/12/26 | Boston Red Sox signed free agent RHP Morgan McSweeney to a minor league contract. |
| 08/12/26 | Boston Red Sox designated RHP Seth Martinez for assignment. |
| 08/12/26 | Boston Red Sox recalled LHP Alec Gamboa from Worcester Red Sox. |
| 08/12/26 | Boston Red Sox traded CF Harold Rivas to Baltimore Orioles. Player to be named later from the 8/3 Adley Rutschman trade. |
| 08/11/26 | Boston Red Sox signed free agent RHP Aaron Nixon to a minor league contract. |
| 08/11/26 | Boston Red Sox designated C Jake Rogers for assignment. |
| 08/11/26 | Boston Red Sox transferred 2B Isiah Kiner-Falefa from the 10-day injured list to the 60-day injured list. |
| 08/11/26 | Boston Red Sox activated C Adley Rutschman from the 10-day injured list. |
| 08/09/26 | Boston Red Sox selected the contract of RHP Seth Martinez from Worcester Red Sox. |
| 08/09/26 | Boston Red Sox optioned LHP Raymond Burgos to Worcester Red Sox. |
| 08/08/26 | Boston Red Sox sent C Adley Rutschman on a rehab assignment to Worcester Red Sox. |
| 08/07/26 | Boston Red Sox signed free agent RHP John Brebbia to a minor league contract. |
| 08/07/26 | Boston Red Sox selected the contract of LHP Raymond Burgos from Worcester Red Sox. |
| 08/07/26 | Boston Red Sox optioned RHP Greg Weissert to Worcester Red Sox. |
| 08/07/26 | Los Angeles Angels claimed RHP Ryan Watson off waivers from Boston Red Sox. |
| 08/06/26 | Boston Red Sox released LHP Joe La Sorsa. |
| 08/05/26 | Boston Red Sox signed free agent RHP Cam Padgett to a minor league contract. |
| 08/04/26 | Boston Red Sox activated RF Eli White. |
| 08/04/26 | Boston Red Sox activated C Jake Rogers. |
| 08/04/26 | Boston Red Sox activated LHP Erik Miller. |
| 08/04/26 | Boston Red Sox designated RHP Ryan Watson for assignment. |
| 08/04/26 | Boston Red Sox optioned DH Romy Gonzalez to Worcester Red Sox. |
| 08/03/26 | Boston Red Sox placed C Adley Rutschman on the 10-day injured list. Left wrist inflammation. |
| 08/03/26 | Boston Red Sox traded 2B Marcelo Mayer to San Francisco Giants for LHP Erik Miller and CF Carlos Gutierrez. |
| 08/03/26 | Boston Red Sox traded 2B Marcelo Mayer to San Francisco Giants for LHP Erik Miller and CF Carlos Gutierrez. |
| 08/03/26 | Boston Red Sox traded 2B Marcelo Mayer to San Francisco Giants for LHP Erik Miller and CF Carlos Gutierrez. |
| 08/03/26 | Atlanta Braves traded RF Eli White to Boston Red Sox for RHP Tyler Uberstine. |
| 08/03/26 | Atlanta Braves traded RF Eli White to Boston Red Sox for RHP Tyler Uberstine. |
| 08/03/26 | Baltimore Orioles traded C Adley Rutschman, C Jake Rogers and cash to Boston Red Sox for RHP Kyson Witherspoon, CF Enddy Azocar, C Carlos Narváez, RHP Anthony Eyanson and Player To Be Named Later. |
| 08/03/26 | Baltimore Orioles traded C Adley Rutschman, C Jake Rogers and cash to Boston Red Sox for RHP Kyson Witherspoon, CF Enddy Azocar, C Carlos Narváez, RHP Anthony Eyanson and Player To Be Named Later. |
| 08/03/26 | Baltimore Orioles traded C Adley Rutschman, C Jake Rogers and cash to Boston Red Sox for RHP Kyson Witherspoon, CF Enddy Azocar, C Carlos Narváez, RHP Anthony Eyanson and Player To Be Named Later. |
| 08/03/26 | Baltimore Orioles traded C Adley Rutschman, C Jake Rogers and cash to Boston Red Sox for RHP Kyson Witherspoon, CF Enddy Azocar, C Carlos Narváez, RHP Anthony Eyanson and Player To Be Named Later. |
| 08/03/26 | Baltimore Orioles traded C Adley Rutschman, C Jake Rogers and cash to Boston Red Sox for RHP Kyson Witherspoon, CF Enddy Azocar, C Carlos Narváez, RHP Anthony Eyanson and Player To Be Named Later. |
| 08/03/26 | Baltimore Orioles traded C Adley Rutschman, C Jake Rogers and cash to Boston Red Sox for RHP Kyson Witherspoon, CF Enddy Azocar, C Carlos Narváez, RHP Anthony Eyanson and Player To Be Named Later. |
| 08/01/26 | Boston Red Sox traded LHP Jojo Ingrassia to Detroit Tigers. |