Portland Sea Dogs Roster & Staff
Portland Transactions
| Date | Transaction |
| 09/08/26 | Portland Sea Dogs activated RHP Tanner Houck from the 60-day injured list. |
| 09/08/26 | Portland Sea Dogs transferred 1B Hudson White to the Development List. |
| 09/08/26 | Boston Red Sox sent RHP Tanner Houck on a rehab assignment to Portland Sea Dogs. |
| 09/08/26 | RHP Aaron Nixon assigned to Portland Sea Dogs from Greenville Drive. |
| 09/08/26 | 2B Tyler McDonough assigned to Worcester Red Sox from Portland Sea Dogs. |
| 09/08/26 | OF Isaiah Jackson assigned to Portland Sea Dogs from Greenville Drive. |
| 09/08/26 | RHP Griffin Kilander assigned to Portland Sea Dogs from Greenville Drive. |
| 09/03/26 | LHP Michael Sansone assigned to Worcester Red Sox from Portland Sea Dogs. |
| 09/01/26 | Portland Sea Dogs placed RHP Reidis Sena on the 7-day injured list. |
| 09/01/26 | Portland Sea Dogs activated RHP Morgan McSweeney from the Development List. |
| 09/01/26 | RHP Max Carlson assigned to Portland Sea Dogs from Worcester Red Sox. |