Portland Sea Dogs Roster & Staff
Portland Transactions
| Date | Transaction |
| 06/30/25 | Portland Sea Dogs placed C Mark Kolozsvary on the full-season injured list. |
| 06/24/25 | Portland Sea Dogs placed RHP Gabriel Jackson on the 7-day injured list. |
| 06/24/25 | LHP Eduardo Rivera assigned to Portland Sea Dogs from Greenville Drive. |
| 06/24/25 | C Juan Montero assigned to Greenville Drive from Portland Sea Dogs. |
| 06/24/25 | LHP Payton Tolle assigned to Portland Sea Dogs from Greenville Drive. |
| 06/24/25 | C Brooks Brannon assigned to Portland Sea Dogs from Greenville Drive. |
| 06/21/25 | Portland Sea Dogs activated SS Luis Ravelo. |
| 06/21/25 | Portland Sea Dogs placed 3B Tyler Miller on the 7-day injured list. |
| 06/21/25 | Portland Sea Dogs placed RHP Blake Wehunt on the 7-day injured list. |
| 06/20/25 | Portland Sea Dogs activated SS Mikey Romero from the 7-day injured list. |
| 06/20/25 | Portland Sea Dogs placed RHP Yordanny Monegro on the full-season injured list. |
| 06/20/25 | Portland Sea Dogs transferred SS Luis Ravelo to the Development List. |
| 06/20/25 | Portland Sea Dogs activated LHP Jeremy Wu-Yelland from the 7-day injured list. |
| 06/19/25 | Portland Sea Dogs placed RHP Reidis Sena on the 7-day injured list retroactive to June 18, 2025. |
| 06/17/25 | Portland Sea Dogs activated RF James Tibbs III. |
| 06/17/25 | SS Karson Simas assigned to Worcester Red Sox from Portland Sea Dogs. |
| 06/17/25 | RF James Tibbs III assigned to Portland Sea Dogs from Greenville Drive. |
| 06/14/25 | Portland Sea Dogs placed RHP Yordanny Monegro on the 7-day injured list. |
| 06/14/25 | Portland Sea Dogs activated RHP Caleb Bolden from the 7-day injured list. |
| 06/13/25 | RHP Gabriel Jackson assigned to Portland Sea Dogs from Worcester Red Sox. |
| 06/12/25 | Portland Sea Dogs activated C Juan Montero. |
| 06/12/25 | Portland Sea Dogs placed C Mark Kolozsvary on the 7-day injured list. |
| 06/12/25 | C Juan Montero assigned to Portland Sea Dogs from Greenville Drive. |
| 06/10/25 | Portland Sea Dogs activated RF Juan Chacon. |
| 06/10/25 | RHP Jonathan Brand assigned to Portland Sea Dogs from Greenville Drive. |
| 06/10/25 | RHP Gabriel Jackson assigned to Worcester Red Sox from Portland Sea Dogs. |
| 06/10/25 | RF Corey Rosier assigned to Worcester Red Sox from Portland Sea Dogs. |
| 06/06/25 | Portland Sea Dogs activated RHP Noah Song from the 7-day injured list. |
| 06/05/25 | Portland Sea Dogs transferred RF Juan Chacon to the Development List. |
| 06/04/25 | Portland Sea Dogs placed SS Mikey Romero on the 7-day injured list. |
| 06/04/25 | RHP Isaac Coffey assigned to Worcester Red Sox from Portland Sea Dogs. |
| 06/03/25 | Portland Sea Dogs activated SS Luis Ravelo. |
| 06/03/25 | Portland Sea Dogs sent RHP Noah Song on a rehab assignment to Greenville Drive. |
| 06/03/25 | Boston Red Sox sent LHP Chris Murphy on a rehab assignment to Portland Sea Dogs. |
| 06/03/25 | Portland Sea Dogs transferred RF Juan Chacon to the Development List. |
| 06/03/25 | RHP Jonathan Brand assigned to Greenville Drive from Portland Sea Dogs. |
| 06/03/25 | SS Karson Simas assigned to Portland Sea Dogs from Worcester Red Sox. |
| 06/03/25 | 3B Blaze Jordan assigned to Worcester Red Sox from Portland Sea Dogs. |
| 06/03/25 | RF Corey Rosier assigned to Portland Sea Dogs from Worcester Red Sox. |