Mariners Roster & Staff
Transactions
| Date | Transaction |
| 01/31/23 | Seattle Mariners invited non-roster SS Jose Caballero to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster C Jake Anchia to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster OF Zach DeLoach to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster LHP Nick Margevicius to spring training. |
| 01/31/23 | Seattle Mariners signed free agent RHP Francisco Pazos to a minor league contract. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Bryce Miller to spring training. |
| 01/31/23 | Seattle Mariners designated RHP J.B. Bukauskas for assignment. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Travis Kuhn to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster C Harry Ford to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster 1B Mike Ford to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Darren McCaughan to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster 3B Drew Ellis to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster LF Robert Perez Jr. to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Taylor Dollard to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Emerson Hancock to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster SS Mason McCoy to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster OF Jack Larsen to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster 3B Jake Scheiner to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster C Matt Scheffler to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Jose Rodriguez to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Ryder Ryan to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Riley O'Brien to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster RHP Bryan Woo to spring training. |
| 01/31/23 | Seattle Mariners invited non-roster 2B Kaden Polcovich to spring training. |
| 01/31/23 | Seattle Mariners claimed LHP Tayler Saucedo off waivers from New York Mets. |
| 01/30/23 | Seattle Mariners signed free agent LHP Ian Clarkin to a minor league contract. |
| 01/30/23 | Seattle Mariners signed free agent SS Leonardo Rivas to a minor league contract and invited him to spring training. |
| 01/30/23 | Seattle Mariners signed free agent RHP Allan Saathoff to a minor league contract. |
| 01/30/23 | Seattle Mariners signed free agent RHP Taylor Williams to a minor league contract and invited him to spring training. |
| 01/26/23 | Seattle Mariners sent LHP Justus Sheffield outright to Tacoma Rainiers. |
| 01/25/23 | LHP Justus Sheffield roster status changed by Seattle Mariners. |
| 01/24/23 | Seattle Mariners signed free agent RHP Connor Prins to a minor league contract. |
| 01/24/23 | Seattle Mariners sent OF Alberto Rodriguez outright to Tacoma Rainiers. |
| 01/23/23 | Seattle Mariners signed free agent 3B Colin Moran to a minor league contract and invited him to spring training. |
| 01/20/23 | Seattle Mariners signed free agent 3B Josh Morgan to a minor league contract. |
| 01/19/23 | Seattle Mariners designated LHP Justus Sheffield for assignment. |
| 01/19/23 | Seattle Mariners signed free agent 2B Tommy La Stella. |
| 01/18/23 | Seattle Mariners signed free agent 3B Jason Vosler to a minor league contract. |
| 01/17/23 | Seattle Mariners designated OF Alberto Rodriguez for assignment. |
| 01/17/23 | Seattle Mariners claimed RHP J.B. Bukauskas off waivers from Arizona Diamondbacks. |
| 01/15/23 | Seattle Mariners signed free agent RHP Ruddy Navarro to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent OF Kay Robles to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent RHP Jeter Martinez to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent RHP Dylan Wilson to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent SS Gustavo Beltran to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent SS Alexander Garcia to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent C Sebastian De Andrade to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent OF Kelvin Alcantara to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent 2B Delfry Carrasco to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent SS Felnin Celesten to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent OF Jean C. Gutierrez to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent RHP Jose Romero to a minor league contract. |
| 01/15/23 | Seattle Mariners signed free agent RHP Kendal Meza to a minor league contract. |
| 01/12/23 | Seattle Mariners signed free agent CF AJ Pollock. |
| 01/11/23 | Seattle Mariners signed free agent 2B Robbie Tenerowicz to a minor league contract. |
| 01/09/23 | Seattle Mariners signed free agent 1B Mike Ford to a minor league contract. |
| 01/07/23 | Milwaukee Brewers traded RHP Justin Topa to Seattle Mariners for RHP Joseph Hernandez. |
| 01/07/23 | Milwaukee Brewers traded RHP Justin Topa to Seattle Mariners for RHP Joseph Hernandez. |