Mariners Roster & Staff
Transactions
| Date | Transaction |
| 02/28/23 | RHP Kelvin Nunez roster status changed by Seattle Mariners. |
| 02/28/23 | C Charlie Welch roster status changed by Seattle Mariners. |
| 02/28/23 | C Charlie Welch roster status changed by Seattle Mariners. |
| 02/28/23 | RHP Collin Kober assigned to Seattle Mariners. |
| 02/28/23 | RHP Kelvin Nunez roster status changed by Seattle Mariners. |
| 02/28/23 | RHP Kelvin Nunez roster status changed by Seattle Mariners. |
| 02/28/23 | C Charlie Welch assigned to Seattle Mariners. |
| 02/28/23 | RHP Kelvin Nunez assigned to Seattle Mariners. |
| 02/27/23 | SS Axel Sanchez roster status changed by Seattle Mariners. |
| 02/27/23 | SS Axel Sanchez roster status changed by Seattle Mariners. |
| 02/27/23 | SS Axel Sanchez roster status changed by Seattle Mariners. |
| 02/27/23 | SS Axel Sanchez assigned to Seattle Mariners. |
| 02/27/23 | SS Axel Sanchez roster status changed by Seattle Mariners. |
| 02/26/23 | LHP Raúl Alcantara assigned to Seattle Mariners. |
| 02/26/23 | LHP Raúl Alcantara roster status changed by Seattle Mariners. |
| 02/26/23 | RHP Stefan Raeth roster status changed by Seattle Mariners. |
| 02/26/23 | RHP Chris Jefferson roster status changed by Seattle Mariners. |
| 02/26/23 | RHP Dayeison Arias roster status changed by Seattle Mariners. |
| 02/26/23 | RHP Dayeison Arias assigned to Seattle Mariners. |
| 02/26/23 | RHP Chris Jefferson assigned to Seattle Mariners. |
| 02/26/23 | RHP Stefan Raeth assigned to Seattle Mariners. |
| 02/25/23 | RHP Devin Sweet assigned to Seattle Mariners. |
| 02/25/23 | RHP Sam Carlson assigned to Seattle Mariners. |
| 02/25/23 | RHP Troy Taylor roster status changed by Seattle Mariners. |
| 02/25/23 | LHP Jorge Benitez roster status changed by Seattle Mariners. |
| 02/25/23 | LHP Jorge Benitez roster status changed by Seattle Mariners. |
| 02/25/23 | RHP Sam Carlson roster status changed by Seattle Mariners. |
| 02/25/23 | RHP Devin Sweet roster status changed by Seattle Mariners. |
| 02/25/23 | RHP Jack Parisi assigned to Seattle Mariners. |
| 02/25/23 | RHP Troy Taylor assigned to Seattle Mariners. |
| 02/25/23 | LHP Jorge Benitez roster status changed by Seattle Mariners. |
| 02/25/23 | LHP Jorge Benitez assigned to Seattle Mariners. |
| 02/24/23 | Seattle Mariners signed free agent RF Kole Calhoun to a minor league contract and invited him to spring training. |
| 02/24/23 | RHP Jake Haberer and assigned to Seattle Mariners. |
| 02/24/23 | RHP Logan Rinehart roster status changed by Seattle Mariners. |
| 02/24/23 | RHP Bernie Martinez roster status changed by Seattle Mariners. |
| 02/24/23 | RHP Collin Kober assigned to Seattle Mariners. |
| 02/24/23 | RHP Kelvin Nunez assigned to Seattle Mariners. |
| 02/24/23 | RHP Bernie Martinez assigned to Seattle Mariners. |
| 02/24/23 | RHP Logan Rinehart assigned to Seattle Mariners. |
| 02/18/23 | Seattle Mariners signed free agent 2B Kean Wong and to a minor league contract and invited him to spring training. |
| 02/10/23 | CF Leonys Martin roster status changed by Seattle Mariners. |
| 02/10/23 | CF Leonys Martin roster status changed by Seattle Mariners. |
| 02/10/23 | Seattle Mariners signed free agent CF Leonys Martin to a minor league contract. |
| 02/09/23 | Seattle Mariners signed free agent RHP Carson Fulmer to a minor league contract. |
| 02/08/23 | Seattle Mariners signed free agent RHP A.J. Puckett to a minor league contract. |
| 02/06/23 | Seattle Mariners invited non-roster RHP J.B. Bukauskas and to spring training. |
| 02/06/23 | Seattle Mariners signed free agent RHP Shaddon Peavyhouse to a minor league contract. |
| 02/03/23 | Seattle Mariners signed free agent RHP Kyle Tyler to a minor league contract. |
| 02/03/23 | Seattle Mariners sent RHP J.B. Bukauskas outright to Tacoma Rainiers. |