Tacoma Rainiers Roster & Staff
Tacoma Transactions
| Date | Transaction |
| 08/25/26 | Tacoma Rainiers placed RHP Nick Hull on the 7-day injured list. |
| 08/25/26 | Tacoma Rainiers activated LHP Jhonathan Díaz. |
| 08/25/26 | Seattle Mariners optioned 3B Leo Rivas to Tacoma Rainiers. |
| 08/24/26 | Seattle Mariners sent LHP Jhonathan Díaz outright to Tacoma Rainiers. |
| 08/23/26 | Seattle Mariners recalled 3B Patrick Wisdom from Tacoma Rainiers. |
| 08/22/26 | Tacoma Rainiers activated LHP Robinson Ortiz from the 7-day injured list. |
| 08/22/26 | Tacoma Rainiers released RHP Gunner Mayer. |
| 08/22/26 | Tacoma Rainiers placed OF Spencer Packard on the 7-day injured list. |
| 08/22/26 | Tacoma Rainiers activated LHP Josh Simpson. |
| 08/22/26 | Seattle Mariners sent RHP Cooper Criswell on a rehab assignment to Tacoma Rainiers. |
| 08/21/26 | Tacoma Rainiers activated RHP Nick Davila. |
| 08/21/26 | Seattle Mariners optioned RHP Nick Davila to Tacoma Rainiers. |
| 08/20/26 | Seattle Mariners sent SS J.P. Crawford on a rehab assignment to Tacoma Rainiers. |
| 08/19/26 | Tacoma Rainiers activated CF Stuart Fairchild. |
| 08/19/26 | Seattle Mariners optioned LHP Josh Simpson to Tacoma Rainiers. |
| 08/19/26 | Seattle Mariners selected the contract of LHP Jhonathan Díaz from Tacoma Rainiers. |
| 08/18/26 | 2B Andy Ibáñez assigned to Tacoma Rainiers. |
| 08/18/26 | CF Stuart Fairchild roster status changed by Tacoma Rainiers. |
| 08/17/26 | Tacoma Rainiers transferred C Jakson Reetz to the Development List. |
| 08/16/26 | Tacoma Rainiers activated RHP Troy Watson. |
| 08/15/26 | Tacoma Rainiers released C Aaron McKeithan. |
| 08/15/26 | Seattle Mariners optioned RHP Troy Watson to Tacoma Rainiers. |
| 08/14/26 | Seattle Mariners selected the contract of 2B Brock Rodden from Tacoma Rainiers. |
| 08/14/26 | Seattle Mariners optioned C Willie MacIver to Tacoma Rainiers. |
| 08/12/26 | RHP Scott Effross assigned to Tacoma Rainiers. |
| 08/11/26 | Tacoma Rainiers activated RHP Nolan Kingham. |
| 08/11/26 | Tacoma Rainiers placed C Jakson Reetz on the temporarily inactive list. |
| 08/11/26 | Seattle Mariners sent RHP Carlos Vargas on a rehab assignment to Tacoma Rainiers. |
| 08/10/26 | RHP Nolan Kingham assigned to Tacoma Rainiers. |
| 08/08/26 | CF Stuart Fairchild assigned to Tacoma Rainiers. |
| 08/08/26 | Tacoma Rainiers released RHP Casey Lawrence. |
| 08/07/26 | CF Stuart Fairchild elected free agency. |
| 08/07/26 | Seattle Mariners sent CF Stuart Fairchild outright to Tacoma Rainiers. |
| 08/07/26 | Seattle Mariners recalled RHP Nick Davila from Tacoma Rainiers. |
| 08/06/26 | RHP Seth Shuman assigned to Tacoma Rainiers from ACL Mariners. |
| 08/04/26 | Tacoma Rainiers activated C Aaron McKeithan. |
| 08/04/26 | Tacoma Rainiers activated RF Nolan Jones. |
| 08/04/26 | C Aaron McKeithan assigned to Tacoma Rainiers from Arkansas Travelers. |
| 08/04/26 | Seattle Mariners recalled C Jhonny Pereda from Tacoma Rainiers. |
| 08/02/26 | RF Nolan Jones assigned to Tacoma Rainiers. |
| 08/02/26 | Seattle Mariners recalled LHP Josh Simpson from Tacoma Rainiers. |
| 08/01/26 | Seattle Mariners selected the contract of CF Stuart Fairchild from Tacoma Rainiers. |