Mariners Roster & Staff
Transactions
| Date | Transaction |
| 04/18/24 | Seattle Mariners signed free agent RHP Luke Barker to a minor league contract. |
| 04/17/24 | Seattle Mariners sent RHP Collin Snider on a rehab assignment to Tacoma Rainiers. |
| 04/17/24 | Seattle Mariners sent RHP Cody Bolton on a rehab assignment to Tacoma Rainiers. |
| 04/17/24 | Seattle Mariners activated 2B Sam Haggerty from the 10-day injured list. |
| 04/17/24 | Seattle Mariners optioned 2B Sam Haggerty to Tacoma Rainiers. |
| 04/15/24 | Seattle Mariners placed RF Dominic Canzone on the 10-day injured list. Left AC joint sprain. |
| 04/15/24 | Detroit Tigers claimed RHP Ty Adcock off waivers from Seattle Mariners. |
| 04/15/24 | Seattle Mariners recalled OF Jonatan Clase from Tacoma Rainiers. |
| 04/09/24 | Seattle Mariners signed free agent C Beau Taylor to a minor league contract. |
| 04/08/24 | Seattle Mariners placed RHP Collin Snider on the 15-day injured list. Left knee contusion. |
| 04/08/24 | Seattle Mariners activated 3B Ty France from the paternity list. |
| 04/08/24 | Seattle Mariners designated RHP Ty Adcock for assignment. |
| 04/08/24 | Seattle Mariners placed RHP Cody Bolton on the 15-day injured list retroactive to April 6, 2024. General medical issue. |
| 04/08/24 | Seattle Mariners selected the contract of RHP Brett de Geus from Tacoma Rainiers. |
| 04/08/24 | Seattle Mariners selected the contract of RHP Tyson Miller from Tacoma Rainiers. |
| 04/08/24 | Seattle Mariners optioned 2B Samad Taylor to Tacoma Rainiers. |
| 04/05/24 | Seattle Mariners signed free agent LHP Dallas Keuchel to a minor league contract. |
| 04/05/24 | Seattle Mariners placed 3B Ty France on the paternity list. |
| 04/05/24 | Seattle Mariners sent 2B Sam Haggerty on a rehab assignment to Tacoma Rainiers. |
| 04/05/24 | Seattle Mariners recalled 2B Samad Taylor from Tacoma Rainiers. |
| 04/02/24 | Seattle Mariners signed free agent RHP Bryan Pope to a minor league contract. |
| 04/02/24 | Seattle Mariners claimed LHP Sammy Peralta off waivers from Chicago White Sox. |
| 04/02/24 | Los Angeles Dodgers claimed LF Taylor Trammell off waivers from Seattle Mariners. |
| 04/01/24 | Seattle Mariners signed free agent RHP Matt Tabor to a minor league contract. |