Mariners Roster & Staff
Transactions
| Date | Transaction |
| 07/31/22 | Seattle Mariners placed 1B Dylan Moore on the 10-day injured list. Back spasms. |
| 07/31/22 | Seattle Mariners sent LF Taylor Trammell on a rehab assignment to Tacoma Rainiers. |
| 07/31/22 | Seattle Mariners sent LF Taylor Trammell on a rehab assignment to Tacoma Rainiers. |
| 07/31/22 | Seattle Mariners designated LHP Anthony Misiewicz for assignment. |
| 07/31/22 | Seattle Mariners placed OF Julio Rodriguez on the 10-day injured list. Right wrist contusion. |
| 07/31/22 | Seattle Mariners selected the contract of OF Jack Larsen from Arkansas Travelers. |
| 07/30/22 | Seattle Mariners placed LHP Tommy Milone on the 15-day injured list. Cervical muscle strain. |
| 07/30/22 | Seattle Mariners designated CF Marcus Wilson for assignment. |
| 07/30/22 | Cincinnati Reds traded RHP Luis Castillo to Seattle Mariners for SS Noelvi Marte, SS Edwin Arroyo, RHP Levi Stoudt and RHP Andrew Moore. |
| 07/30/22 | Seattle Mariners selected the contract of LHP Brennan Bernardino from Tacoma Rainiers. |
| 07/30/22 | Cincinnati Reds traded RHP Luis Castillo to Seattle Mariners for SS Noelvi Marte, SS Edwin Arroyo, RHP Levi Stoudt and RHP Andrew Moore. |
| 07/30/22 | Cincinnati Reds traded RHP Luis Castillo to Seattle Mariners for SS Noelvi Marte, SS Edwin Arroyo, RHP Levi Stoudt and RHP Andrew Moore. |
| 07/30/22 | Cincinnati Reds traded RHP Luis Castillo to Seattle Mariners for SS Noelvi Marte, SS Edwin Arroyo, RHP Levi Stoudt and RHP Andrew Moore. |
| 07/30/22 | Cincinnati Reds traded RHP Luis Castillo to Seattle Mariners for SS Noelvi Marte, SS Edwin Arroyo, RHP Levi Stoudt and RHP Andrew Moore. |
| 07/29/22 | Seattle Mariners claimed RHP Phillips Valdez off waivers from Boston Red Sox. |
| 07/28/22 | Seattle Mariners placed RHP Diego Castillo on the 15-day injured list retroactive to July 26, 2022. Right shoulder inflammation. |
| 07/28/22 | Seattle Mariners recalled RHP Matt Brash, and from Tacoma Rainiers. |
| 07/26/22 | Seattle Mariners signed 3B Tyler Locklear. |
| 07/26/22 | Seattle Mariners signed RHP Darren Bowen. |
| 07/26/22 | Seattle Mariners signed 3B Blake Rambusch. |
| 07/26/22 | 1B Hogan Windish roster status changed by Seattle Mariners. |
| 07/26/22 | Seattle Mariners signed 2B Hogan Windish. |
| 07/26/22 | Seattle Mariners signed RHP Marcelo Perez. |
| 07/26/22 | Seattle Mariners signed LHP Brandon Schaeffer. |
| 07/26/22 | Seattle Mariners signed free agent C Connor Charping to a minor league contract. |
| 07/26/22 | Seattle Mariners signed OF Bill Knight. |
| 07/26/22 | Seattle Mariners signed LHP Reid VanScoter. |
| 07/26/22 | Seattle Mariners signed RHP Ashton Izzi. |
| 07/26/22 | Seattle Mariners signed SS Josh Hood. |
| 07/26/22 | Seattle Mariners signed RHP Stefan Raeth. |
| 07/26/22 | Seattle Mariners signed 2B Nick Zona. |
| 07/26/22 | 3B Blake Rambusch roster status changed by Seattle Mariners. |
| 07/26/22 | Seattle Mariners signed RHP Troy Taylor. |
| 07/26/22 | Seattle Mariners signed SS Cole Young. |
| 07/26/22 | Seattle Mariners signed C Tatem Levins. |
| 07/26/22 | Seattle Mariners signed RHP Walter Ford. |
| 07/26/22 | Seattle Mariners signed RHP Tyler Gough. |
| 07/26/22 | Seattle Mariners signed OF Curtis Washington Jr.. |
| 07/26/22 | Seattle Mariners signed RHP Tyler Cleveland. |
| 07/26/22 | Seattle Mariners optioned RHP Matt Brash to Tacoma Rainiers. |
| 07/26/22 | Seattle Mariners recalled RHP George Kirby, and from Tacoma Rainiers. |
| 07/25/22 | Seattle Mariners sent RF Mitch Haniger on a rehab assignment to Tacoma Rainiers. |
| 07/22/22 | Seattle Mariners signed free agent RHP Taylor Williams to a minor league contract. |
| 07/22/22 | LF Justin Upton elected free agency. |
| 07/22/22 | Seattle Mariners optioned LF Justin Upton to Tacoma Rainiers. |
| 07/21/22 | Seattle Mariners sent RF Mitch Haniger on a rehab assignment to Everett AquaSox. |
| 07/17/22 | Seattle Mariners sent RHP Jacob Barnes outright to Tacoma Rainiers. |
| 07/16/22 | Seattle Mariners activated 1B Carlos Santana from the restricted list. |
| 07/16/22 | Seattle Mariners activated 1B Carlos Santana from the restricted list. |
| 07/16/22 | Seattle Mariners optioned 3B Kevin Padlo to Tacoma Rainiers. |
| 07/15/22 | Seattle Mariners placed 1B Carlos Santana on the restricted list. |
| 07/15/22 | Seattle Mariners recalled 3B Kevin Padlo from Tacoma Rainiers. |
| 07/14/22 | Tacoma Rainiers recalled LHP Danny Young from Seattle Mariners. |
| 07/13/22 | C Andrew Knapp elected free agency. |
| 07/13/22 | Seattle Mariners activated OF Julio Rodriguez. |
| 07/13/22 | Seattle Mariners recalled LHP Danny Young from Tacoma Rainiers. |
| 07/12/22 | Seattle Mariners sent CF Kyle Lewis on a rehab assignment to Tacoma Rainiers. |
| 07/12/22 | OF Julio Rodriguez roster status changed by Seattle Mariners. |
| 07/11/22 | Seattle Mariners designated RHP Jacob Barnes for assignment. |
| 07/11/22 | Seattle Mariners activated LF Jesse Winker. |
| 07/11/22 | Seattle Mariners activated RHP Erik Swanson from the paternity list. |
| 07/09/22 | Seattle Mariners designated C Andrew Knapp for assignment. |
| 07/09/22 | Seattle Mariners placed RHP Ken Giles on the 15-day injured list. Right shoulder tightness. |
| 07/09/22 | Seattle Mariners placed RHP Erik Swanson on the paternity list. |
| 07/09/22 | Seattle Mariners activated C Luis Torrens. |
| 07/09/22 | Seattle Mariners optioned RHP George Kirby to Tacoma Rainiers. |
| 07/09/22 | Seattle Mariners recalled RHP Matt Brash from Tacoma Rainiers. |
| 07/09/22 | Seattle Mariners recalled RHP Matthew Festa from Tacoma Rainiers. |
| 07/09/22 | Seattle Mariners selected the contract of RHP Jacob Barnes from Tacoma Rainiers. |
| 07/08/22 | Seattle Mariners sent C Luis Torrens on a rehab assignment to Everett AquaSox. |
| 07/07/22 | Seattle Mariners activated 3B Ty France from the 10-day injured list. |
| 07/07/22 | Seattle Mariners optioned CF Marcus Wilson to Tacoma Rainiers. |
| 07/06/22 | Seattle Mariners signed free agent LHP Blake Weiman to a minor league contract. |
| 07/04/22 | Seattle Mariners activated SS J.P. Crawford. |
| 07/04/22 | LF Jesse Winker roster status changed by Seattle Mariners. |
| 07/04/22 | Seattle Mariners sent CF Kyle Lewis on a rehab assignment to Everett AquaSox. |
| 07/04/22 | Seattle Mariners sent CF Kyle Lewis on a rehab assignment to Everett AquaSox. |
| 07/03/22 | Seattle Mariners sent CF Kyle Lewis on a rehab assignment to Tacoma Rainiers. |