Mariners Roster & Staff
Transactions
| Date | Transaction |
| 02/29/24 | LHP Raúl Alcantara assigned to Seattle Mariners. |
| 02/29/24 | RHP Logan Evans assigned to Seattle Mariners. |
| 02/29/24 | OF Jonny Farmelo assigned to Seattle Mariners. |
| 02/29/24 | OF Bill Knight assigned to Seattle Mariners. |
| 02/28/24 | SS Colt Emerson assigned to Seattle Mariners. |
| 02/27/24 | RHP Troy Taylor assigned to Seattle Mariners. |
| 02/26/24 | RHP Elijah Dale assigned to Seattle Mariners. |
| 02/25/24 | RHP Blas Castano assigned to Seattle Mariners. |
| 02/25/24 | RHP Nick Davila assigned to Seattle Mariners. |
| 02/24/24 | RHP Stefan Raeth roster status changed by Seattle Mariners. |
| 02/24/24 | Seattle Mariners signed free agent 3B Brian Anderson to a minor league contract. |
| 02/24/24 | RHP Juan Mercedes assigned to Seattle Mariners. |
| 02/24/24 | RHP Jarod Bayless assigned to Seattle Mariners. |
| 02/24/24 | Seattle Mariners signed free agent RHP Trevor Kelley to a minor league contract. |
| 02/24/24 | RHP Juan Burgos assigned to Seattle Mariners. |
| 02/24/24 | RHP Jarod Bayless roster status changed by Seattle Mariners. |
| 02/24/24 | LHP Peyton Alford assigned to Seattle Mariners. |
| 02/24/24 | LHP Peyton Alford roster status changed by Seattle Mariners. |
| 02/24/24 | RHP Stefan Raeth assigned to Seattle Mariners. |
| 02/24/24 | RHP Brett de Geus assigned to Seattle Mariners. |
| 02/23/24 | Seattle Mariners signed free agent LHP Danny Wirchansky to a minor league contract. |
| 02/19/24 | Pittsburgh Pirates claimed CF Canaan Smith-Njigba off waivers from Seattle Mariners. |
| 02/18/24 | Seattle Mariners signed free agent 2B Robbie Tenerowicz to a minor league contract. |
| 02/17/24 | Seattle Mariners claimed RHP Levi Stoudt off waivers from Cincinnati Reds. |
| 02/12/24 | Seattle Mariners traded RHP Darren McCaughan to Miami Marlins. |
| 02/09/24 | Seattle Mariners signed free agent RHP Jordan Holloway to a minor league contract. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Ty Buttrey to spring training. |
| 02/07/24 | Seattle Mariners designated RHP Darren McCaughan for assignment. |
| 02/07/24 | Seattle Mariners signed free agent RHP Cory Abbott to a minor league contract and invited him to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Tyson Miller to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Marcelo Perez to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster C Jake Anchia to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster C Michael Papierski to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster RF Isiah Gilliam to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster OF Alberto Rodriguez to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster SS Ryan Bliss to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster SS Brock Rodden to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster LHP Reid VanScoter to spring training. |
| 02/07/24 | Seattle Mariners signed free agent LHP Jhonathan Diaz to a minor league contract and invited him to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster 2B Michael Chavis to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster SS Leo Rivas to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster 2B Nick Solak to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster OF Spencer Packard to spring training. |
| 02/07/24 | Seattle Mariners signed free agent RHP Joey Krehbiel to a minor league contract and invited him to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster 3B Tyler Locklear to spring training. |
| 02/07/24 | Seattle Mariners signed free agent LHP Kirby Snead to a minor league contract and invited him to spring training. |
| 02/07/24 | RHP Joey Krehbiel roster status changed by Seattle Mariners. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Darren McCaughan to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster C Harry Ford to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster SS Cole Young to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster LHP Holden Laws to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster 1B Hogan Windish to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster 1B Rangel Ravelo to spring training. |
| 02/07/24 | 2B Kaden Polcovich roster status changed by Seattle Mariners. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Sean Poppen to spring training. |
| 02/07/24 | Seattle Mariners signed free agent RHP Casey Lawrence to a minor league contract and invited him to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster C Matt Scheffler to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster 2B Kaden Polcovich to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Jimmy Joyce to spring training. |
| 02/07/24 | Seattle Mariners invited non-roster RHP Travis Kuhn to spring training. |
| 02/07/24 | Seattle Mariners claimed CF Canaan Smith-Njigba off waivers from Pittsburgh Pirates. |
| 02/07/24 | Seattle Mariners sent RHP Darren McCaughan outright to Tacoma Rainiers. |
| 02/06/24 | Seattle Mariners signed free agent 2B Nick Solak to a minor league contract. |
| 02/06/24 | Seattle Mariners signed free agent SS Cole Tucker to a minor league contract. |
| 02/06/24 | SS Cole Tucker roster status changed by Seattle Mariners. |
| 02/06/24 | Seattle Mariners invited non-roster SS Cole Tucker to spring training. |
| 02/06/24 | Seattle Mariners claimed RHP Collin Snider off waivers from Arizona Diamondbacks. |
| 02/03/24 | Seattle Mariners activated RHP Gregory Santos. |
| 02/03/24 | Chicago White Sox traded RHP Gregory Santos to Seattle Mariners for RHP Prelander Berroa, OF Zach DeLoach and Future Considerations. |
| 02/03/24 | Chicago White Sox traded RHP Gregory Santos to Seattle Mariners for RHP Prelander Berroa, OF Zach DeLoach and Future Considerations. |
| 02/03/24 | Chicago White Sox traded RHP Gregory Santos to Seattle Mariners for RHP Prelander Berroa, OF Zach DeLoach and Future Considerations. |
| 02/02/24 | Seattle Mariners signed free agent RHP Juan Cazarez to a minor league contract. |
| 02/02/24 | Seattle Mariners signed free agent RHP Heath Hembree to a minor league contract. |