Red Sox Roster & Staff
Transactions
| Date | Transaction |
| 04/19/21 | Boston Red Sox optioned RHP Tanner Houck to Red Sox Alternate Training Site. |
| 04/16/21 | Boston Red Sox placed RHP Chris Martin on the 15-day injured list. Right shoulder inflammation. |
| 04/15/21 | Boston Red Sox signed free agent RHP Jesus Lopez to a minor league contract. |
| 04/15/21 | Boston Red Sox optioned RHP Eduard Bazardo to Red Sox Alternate Training Site. |
| 04/14/21 | Boston Red Sox recalled P Eduard Bazardo from Red Sox Alternate Training Site. |
| 04/11/21 | Boston Red Sox activated RF J.D. Martinez from the 10 day injured list. |
| 04/11/21 | Boston Red Sox activated RF J.D. Martinez from the 10 day injured list. |
| 04/11/21 | Boston Red Sox optioned 2B Michael Chavis to Red Sox Alternate Training Site. |
| 04/11/21 | Boston Red Sox activated RF J.D. Martinez from the 10 day injured list. |
| 04/10/21 | Boston Red Sox recalled 2B Michael Chavis from Red Sox Alternate Training Site. |
| 04/10/21 | Boston Red Sox placed RF J.D. Martinez on the 10 day injured list. |
| 04/08/21 | Boston Red Sox activated P Eduardo Rodriguez from the 10 day injured list. |
| 04/08/21 | Boston Red Sox activated P Eduardo Rodriguez from the 10 day injured list. |
| 04/08/21 | Boston Red Sox activated P Eduardo Rodriguez from the 10 day injured list. |
| 04/07/21 | Boston Red Sox optioned P Tanner Houck to Red Sox Alternate Training Site. |
| 04/06/21 | Boston Red Sox signed free agent P Tyler Olson. |
| 04/03/21 | Boston Red Sox signed free agent P Hector Rondon. |
| 04/02/21 | Boston Red Sox sent P John Schreiber outright to Red Sox Alternate Training Site. |
| 04/01/21 | Boston Red Sox placed P Eduardo Rodriguez on the 10 day disabled list. |
| 04/01/21 | Boston Red Sox placed P Ryan Brasier on the 10 day disabled list. |