Tacoma Rainiers Roster & Staff
SEA Transactions
| Date | Transaction |
| 04/26/26 | Arkansas Travelers transferred RHP Jason Ruffcorn to the Development List. |
| 04/26/26 | Arkansas Travelers activated RHP Ty Cummings. |
| 04/24/26 | SS Estevan Moreno assigned to Inland Empire 66ers from ACL Mariners. |
| 04/24/26 | RHP Ty Cummings assigned to Arkansas Travelers. |
| 04/24/26 | Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Everett AquaSox. |
| 04/24/26 | Inland Empire 66ers placed 2B Brady O'Brien on the 7-day injured list. |
| 04/24/26 | SS Estevan Moreno assigned to Inland Empire 66ers from ACL Mariners. |
| 04/22/26 | RHP Nick Hull assigned to Tacoma Rainiers. |
| 04/22/26 | Seattle Mariners signed free agent RHP Nick Hull to a minor league contract. |
| 04/21/26 | IF Fabian Gonzalez assigned to DSL Mariners. |
| 04/21/26 | Inland Empire 66ers placed RHP Gage Boehm on the full-season injured list. |
| 04/21/26 | Tacoma Rainiers placed LHP Austin Kitchen on the full-season injured list. |
| 04/21/26 | Tacoma Rainiers activated OF Colin Davis. |
| 04/21/26 | Seattle Mariners recalled RHP Alex Hoppe from Tacoma Rainiers. |
| 04/20/26 | ACL Mariners placed RHP Ryan Loutos on the full-season injured list. |
| 04/20/26 | Seattle Mariners selected the contract of 3B Will Wilson from Tacoma Rainiers. |
| 04/18/26 | Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Tacoma Rainiers. |
| 04/15/26 | Arkansas Travelers placed C Connor Charping on the 7-day injured list. |
| 04/15/26 | Arkansas Travelers activated C Aaron McKeithan. |
| 04/15/26 | Seattle Mariners signed free agent RHP Jesus Rondon to a minor league contract. |
| 04/14/26 | RHP Abdiel Mendoza assigned to Arkansas Travelers from ACL Mariners. |
| 04/14/26 | RHP Abdiel Mendoza assigned to Arkansas Travelers from ACL Mariners. |
| 04/14/26 | RHP Nick Garcia assigned to Tacoma Rainiers from Arkansas Travelers. |
| 04/14/26 | Tacoma Rainiers activated C Brian O'Keefe. |
| 04/14/26 | Seattle Mariners selected the contract of 1B Patrick Wisdom from Tacoma Rainiers. |
| 04/14/26 | RHP Nick Garcia assigned to Tacoma Rainiers from Arkansas Travelers. |
| 04/08/26 | Tacoma Rainiers activated 2B Alejo Lopez. |
| 04/08/26 | Seattle Mariners sent 3B Miles Mastrobuoni on a rehab assignment to Tacoma Rainiers. |
| 04/08/26 | Seattle Mariners sent 3B Miles Mastrobuoni on a rehab assignment to Tacoma Rainiers. |
| 04/08/26 | Seattle Mariners selected the contract of RF Connor Joe from Tacoma Rainiers. |
| 04/07/26 | RHP Ryan Loutos assigned to ACL Mariners. |
| 04/07/26 | Seattle Mariners signed free agent RHP Ryan Loutos to a minor league contract. |
| 04/03/26 | OF Edgardo Toro assigned to DSL Mariners. |
| 04/03/26 | RHP Carlos Martinez assigned to DSL Mariners. |
| 04/03/26 | RHP Adan Vallenilla assigned to DSL Mariners. |
| 04/03/26 | RHP Gabriel Hidalgo assigned to DSL Mariners. |
| 04/03/26 | Tacoma Rainiers placed OF Spencer Packard on the 7-day injured list. |
| 04/03/26 | Tacoma Rainiers transferred 2B Alejo Lopez to the Development List. |
| 04/03/26 | Tacoma Rainiers placed OF Spencer Packard on the 7-day injured list. |
| 04/03/26 | Tacoma Rainiers activated CF Brennen Davis from the 7-day injured list. |
| 04/03/26 | Tacoma Rainiers transferred OF Colin Davis to the Development List. |
| 04/03/26 | Tacoma Rainiers transferred OF Colin Davis to the Development List. |
| 04/03/26 | Tacoma Rainiers activated CF Victor Labrada from the 7-day injured list. |
| 04/02/26 | Arkansas Travelers placed RHP Marcelo Perez on the 7-day injured list. |
| 04/02/26 | Everett AquaSox placed RHP Teddy McGraw on the 7-day injured list. |
| 04/02/26 | Inland Empire 66ers placed RHP Gage Boehm on the 7-day injured list. |
| 04/02/26 | Inland Empire 66ers placed LHP Jack White on the 7-day injured list. |
| 04/02/26 | Seattle Mariners optioned 2B Ryan Bliss to Tacoma Rainiers. |
| 04/01/26 | 2B Brady O'Brien assigned to Inland Empire 66ers from ACL Mariners. |
| 04/01/26 | RHP Abdiel Mendoza assigned to ACL Mariners from Arkansas Travelers. |
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