Mariners Roster & Staff
Transactions
| Date | Transaction |
| 11/19/24 | Seattle Mariners designated RHP JT Chargois for assignment. |
| 11/19/24 | Tampa Bay Rays traded 1B Austin Shenton to Seattle Mariners for cash. |
| 11/18/24 | Seattle Mariners signed free agent RHP Adonis Medina to a minor league contract. |
| 11/18/24 | Seattle Mariners signed free agent RHP Jesse Hahn to a minor league contract. |
| 11/15/24 | Seattle Mariners signed free agent RHP Casey Lawrence to a minor league contract. |
| 11/04/24 | Seattle Mariners activated RHP Matt Brash from the 60-day injured list. |
| 11/04/24 | Seattle Mariners activated LF Sam Haggerty from the 60-day injured list. |
| 11/04/24 | 2B Jorge Polanco elected free agency. |
| 11/04/24 | Seattle Mariners activated RHP Jackson Kowar from the 60-day injured list. |
| 11/04/24 | Seattle Mariners selected the contract of RHP Blas Castano from Tacoma Rainiers. |