Tacoma Rainiers Roster & Staff
SEA Transactions
| Date | Transaction |
| 06/17/25 | SS Luis Rodriguez assigned to ACL Angels from Inland Empire 66ers. |
| 06/17/25 | Tacoma Rainiers transferred RHP Michael Mariot to the Development List. |
| 06/17/25 | Tacoma Rainiers released RHP Bryan Shaw. |
| 06/17/25 | LHP Josh Fleming assigned to Tacoma Rainiers. |
| 06/17/25 | LF Jacob Hurtubise assigned to Tacoma Rainiers. |
| 06/17/25 | Tacoma Rainiers released RHP Shintaro Fujinami. |
| 06/17/25 | RHP Daniel Bard assigned to Tacoma Rainiers from ACL Mariners. |
| 06/16/25 | Seattle Mariners optioned RHP Jackson Kowar to Tacoma Rainiers. |
| 06/16/25 | Seattle Mariners signed free agent LHP Josh Fleming to a minor league contract. |
| 06/15/25 | Everett AquaSox activated RHP Allan Saathoff. |
| 06/15/25 | Tacoma Rainiers released LHP Josh Fleming. |
| 06/14/25 | RHP Casey Lawrence assigned to Tacoma Rainiers from ACL Mariners. |
| 06/14/25 | Everett AquaSox transferred C Andrew Miller to the Development List. |
| 06/14/25 | RHP Jesse Wainscott assigned to Modesto Nuts from Everett AquaSox. |
| 06/14/25 | RHP Teddy McGraw assigned to Everett AquaSox from Modesto Nuts. |
| 06/14/25 | RHP Casey Lawrence assigned to Tacoma Rainiers from ACL Mariners. |
| 06/13/25 | Tacoma Rainiers activated 2B Leo Rivas from the temporarily inactive list. |
| 06/13/25 | Tacoma Rainiers transferred 3B Nick Dunn to the Development List. |
| 06/13/25 | Tacoma Rainiers transferred C Jacob Nottingham to the Development List. |
| 06/13/25 | Seattle Mariners sent CF Leody Taveras outright to Tacoma Rainiers. |
| 06/13/25 | Seattle Mariners optioned RHP Logan Evans to Tacoma Rainiers. |
| 06/13/25 | Seattle Mariners selected the contract of RHP Zach Pop from Tacoma Rainiers. |
| 06/13/25 | Seattle Mariners sent CF Leody Taveras outright to Tacoma Rainiers. |
| 06/12/25 | Seattle Mariners sent RF Luke Raley on a rehab assignment to Tacoma Rainiers. |
| 06/12/25 | Seattle Mariners sent RF Luke Raley on a rehab assignment to Tacoma Rainiers. |
| 06/11/25 | Everett AquaSox transferred RHP Allan Saathoff to the Development List. |
| 06/11/25 | RHP Taylor Dollard assigned to Everett AquaSox from Tacoma Rainiers. |
| 06/11/25 | RHP Taylor Dollard assigned to Everett AquaSox from Tacoma Rainiers. |
| 06/10/25 | RHP Casey Lawrence assigned to ACL Mariners. |
| 06/10/25 | RHP Aiden Butler assigned to Modesto Nuts from ACL Mariners. |
| 06/10/25 | Tacoma Rainiers placed 2B Leo Rivas on the temporarily inactive list. |
| 06/10/25 | Tacoma Rainiers activated RHP Michael Mariot. |
| 06/10/25 | Tacoma Rainiers activated OF Colin Davis. |
| 06/10/25 | Tacoma Rainiers activated C Jacob Nottingham. |
| 06/10/25 | Seattle Mariners recalled RHP Logan Evans from Tacoma Rainiers. |
| 06/10/25 | Seattle Mariners signed free agent RHP Casey Lawrence to a minor league contract. |
| 06/09/25 | RHP Casey Lawrence elected free agency. |
| 06/09/25 | Seattle Mariners sent RHP Casey Lawrence outright to Tacoma Rainiers. |
| 06/09/25 | Seattle Mariners recalled RF Dominic Canzone from Tacoma Rainiers. |
| 06/07/25 | RHP Trevor Gott assigned to Tacoma Rainiers. |
| 06/07/25 | Seattle Mariners signed free agent RHP Trevor Gott to a minor league contract. |
| 06/04/25 | Everett AquaSox activated RHP Tyler Cleveland from the 7-day injured list. |
| 06/04/25 | RHP Najer Victor assigned to Tri-City Dust Devils from Inland Empire 66ers. |
| 06/04/25 | RHP Brandon Dufault assigned to Inland Empire 66ers from ACL Angels. |
| 06/04/25 | Seattle Mariners recalled RHP Casey Legumina from Tacoma Rainiers. |
| 06/03/25 | 1B Dalton Davis assigned to ACL Mariners. |
| 06/03/25 | RHP Daniel Bard assigned to ACL Mariners. |
| 06/03/25 | RHP Nick Fraze assigned to Arkansas Travelers from Tacoma Rainiers. |
| 06/03/25 | RHP Leon Hunter Jr. assigned to Arkansas Travelers from Tacoma Rainiers. |
| 06/03/25 | Everett AquaSox placed OF Jonny Farmelo on the 7-day injured list retroactive to June 1, 2025. |