Mariners Roster & Staff
Transactions
| Date | Transaction |
| 03/05/26 | C Aaron McKeithan 契約 Seattle Mariners. |
| 03/05/26 | SS Axel Sanchez 契約 Seattle Mariners. |
| 03/05/26 | LF Colin Davis 契約 Seattle Mariners. |
| 03/04/26 | 1B Hogan Windish 契約 Seattle Mariners. |
| 03/03/26 | C Connor Dykstra 契約 Seattle Mariners. |
| 03/03/26 | C Mitch Garver 契約 Seattle Mariners. |
| 03/01/26 | OF Bill Knight 契約 Seattle Mariners. |
| 03/01/26 | OF Bill Knight ロスターステータス変更 Seattle Mariners. |
| 03/01/26 | Seattle Mariners フリーエージェント選手 C Jacob Nottingham マイナーリーグ契約. |