Seattle Mariners

Stuart Fairchild — Seattle Mariners sent CF Stuart Fairchild outright to Tacoma Rainiers.

Troy Taylor — Seattle Mariners optioned RHP Troy Taylor to Tacoma Rainiers.

Victor Robles — Seattle Mariners activated RF Victor Robles.

Stuart Fairchild — Seattle Mariners designated CF Stuart Fairchild for assignment.

Hoby Milner — Seattle Mariners activated LHP Hoby Milner.

Michael Arroyo — Seattle Mariners selected the contract of SS Michael Arroyo from Tacoma Rainiers.

Patrick Wisdom — Seattle Mariners optioned 3B Patrick Wisdom to Tacoma Rainiers.

Nick Davila — Seattle Mariners transferred RHP Nick Davila from the 15-day injured list to the 60-day injured list. SC joint sprain.

Troy Taylor — Seattle Mariners recalled RHP Troy Taylor from Tacoma Rainiers.

Hoby Milner — LHP Hoby Milner roster status changed by Seattle Mariners.

Nolan Kingham — Seattle Mariners sent RHP Nolan Kingham outright to Tacoma Rainiers.

Connor Joe — Seattle Mariners sent RF Connor Joe outright to Tacoma Rainiers.

Brennen Davis — Seattle Mariners recalled CF Brennen Davis from Tacoma Rainiers.

Stuart Fairchild — Seattle Mariners selected the contract of CF Stuart Fairchild from Tacoma Rainiers.

Victor Robles — RF Victor Robles roster status changed by Seattle Mariners.

Brennen Davis — Seattle Mariners placed CF Brennen Davis on the 60-day injured list. Left hamstring strain.

Simeon Woods Richardson — Seattle Mariners signed free agent RHP Simeon Woods Richardson to a minor league contract.

Lazaro Montes — Seattle Mariners selected the contract of RF Lazaro Montes from Tacoma Rainiers.

Nolan Kingham — Seattle Mariners designated RHP Nolan Kingham for assignment.

Connor Joe — Seattle Mariners designated RF Connor Joe for assignment.

Hoby Milner — Seattle Mariners signed free agent LHP Hoby Milner.

Nick Davila — Seattle Mariners placed RHP Nick Davila on the 15-day injured list. SC joint sprain.

Cooper Criswell — Seattle Mariners activated RHP Cooper Criswell from the 60-day injured list.

Colt Emerson — Seattle Mariners transferred SS Colt Emerson from the 10-day injured list to the 60-day injured list. Left wrist tendon repair.

Nick Davila — Seattle Mariners recalled RHP Nick Davila from Tacoma Rainiers.

Emerson Hancock — Seattle Mariners placed RHP Emerson Hancock on the 15-day injured list retroactive to August 29, 2026. Left abductor strain.

Leo Rivas — Seattle Mariners optioned 3B Leo Rivas to Tacoma Rainiers.

J.P. Crawford — Seattle Mariners activated SS J.P. Crawford from the 10-day injured list.

Jhonathan Díaz — Seattle Mariners sent LHP Jhonathan Díaz outright to Tacoma Rainiers.

Patrick Wisdom — Seattle Mariners recalled 3B Patrick Wisdom from Tacoma Rainiers.

Brendan Donovan — Seattle Mariners placed 3B Brendan Donovan on the 7-day injured list retroactive to August 22, 2026. Concussion.

Kade Anderson — Seattle Mariners selected the contract of LHP Kade Anderson from Arkansas Travelers.

Jhonathan Díaz — Seattle Mariners designated LHP Jhonathan Díaz for assignment.

Cooper Criswell — Seattle Mariners sent RHP Cooper Criswell on a rehab assignment to Tacoma Rainiers.

Nick Davila — Seattle Mariners optioned RHP Nick Davila to Tacoma Rainiers.

Carlos Vargas — Seattle Mariners activated RHP Carlos Vargas from the 60-day injured list.

Matt Brash — Seattle Mariners transferred RHP Matt Brash from the 15-day injured list to the 60-day injured list. Right lat strain.

J.P. Crawford — Seattle Mariners sent SS J.P. Crawford on a rehab assignment to Tacoma Rainiers.

Jhonathan Díaz — Seattle Mariners selected the contract of LHP Jhonathan Díaz from Tacoma Rainiers.

Josh Simpson — Seattle Mariners optioned LHP Josh Simpson to Tacoma Rainiers.

Luke Raley — Seattle Mariners transferred RF Luke Raley from the 10-day injured list to the 60-day injured list. Left forearm strain.

Andy Ibáñez — Seattle Mariners signed free agent 2B Andy Ibáñez to a minor league contract.

Troy Watson — Seattle Mariners optioned RHP Troy Watson to Tacoma Rainiers.

Troy Watson — Seattle Mariners claimed RHP Troy Watson off waivers from Detroit Tigers.

Brock Rodden — Seattle Mariners selected the contract of 2B Brock Rodden from Tacoma Rainiers.

Willie MacIver — Seattle Mariners optioned C Willie MacIver to Tacoma Rainiers.

Colt Emerson — Seattle Mariners placed SS Colt Emerson on the 10-day injured list. Left wrist tendon inflammation.

Lael Lockhart — Seattle Mariners signed free agent LHP Lael Lockhart to a minor league contract.

Willie MacIver — Seattle Mariners claimed C Willie MacIver off waivers from Toronto Blue Jays.

Scott Effross — Seattle Mariners signed free agent RHP Scott Effross to a minor league contract.

Carlos Vargas — Seattle Mariners sent RHP Carlos Vargas on a rehab assignment to Tacoma Rainiers.

Conor Larkin — Seattle Mariners signed free agent RHP Conor Larkin to a minor league contract.

Gabe Speier — Seattle Mariners activated LHP Gabe Speier.

Nolan Kingham — Seattle Mariners claimed RHP Nolan Kingham off waivers from Texas Rangers.

Stuart Fairchild — Seattle Mariners signed free agent CF Stuart Fairchild to a minor league contract.

Gabe Speier — LHP Gabe Speier roster status changed by Seattle Mariners.

Carlos Vargas — Seattle Mariners sent RHP Carlos Vargas on a rehab assignment to Everett AquaSox.

Carlos Vargas — Seattle Mariners sent RHP Carlos Vargas on a rehab assignment to Everett AquaSox.

Nick Davila — Seattle Mariners recalled RHP Nick Davila from Tacoma Rainiers.

Stuart Fairchild — Seattle Mariners sent CF Stuart Fairchild outright to Tacoma Rainiers.

Cole Wilcox — Seattle Mariners placed RHP Cole Wilcox on the 15-day injured list. Left oblique strain.

Seth Shuman — Seattle Mariners signed free agent RHP Seth Shuman to a minor league contract.

Jhonny Pereda — Seattle Mariners recalled C Jhonny Pereda from Tacoma Rainiers.

Mitch Garver — Seattle Mariners released C Mitch Garver.

Taylor Ward — Seattle Mariners activated LF Taylor Ward.

Brendan Donovan — Seattle Mariners activated 3B Brendan Donovan from the 10-day injured list.

Stuart Fairchild — Seattle Mariners designated CF Stuart Fairchild for assignment.

Rob Refsnyder — Seattle Mariners released DH Rob Refsnyder.

Seranthony Domínguez — Seattle Mariners activated RHP Seranthony Domínguez.

Taylor Ward — LF Taylor Ward roster status changed by Seattle Mariners.

Harrison Kreiling — Baltimore Orioles traded LF Taylor Ward to Seattle Mariners for RHP Alex Hoppe, RHP Brock Moore and RHP Harrison Kreiling.

Buddy Kennedy — San Francisco Giants claimed 1B Buddy Kennedy off waivers from Seattle Mariners.

Josh Simpson — Seattle Mariners recalled LHP Josh Simpson from Tacoma Rainiers.

Boston Smith — Seattle Mariners traded RHP Luis Castillo to Chicago White Sox for RHP Seranthony Domínguez, C Boston Smith, RF Nolan Jones and cash.

Stuart Fairchild — Seattle Mariners selected the contract of CF Stuart Fairchild from Tacoma Rainiers.

Luke Raley — Seattle Mariners placed RF Luke Raley on the 10-day injured list retroactive to July 31, 2026. Left forearm strain.

Leo Rivas — Seattle Mariners recalled 3B Leo Rivas from Tacoma Rainiers.

J.P. Crawford — Seattle Mariners placed SS J.P. Crawford on the 10-day injured list retroactive to July 30, 2026. Left wrist inflammation.

Rob Refsnyder — Seattle Mariners activated DH Rob Refsnyder from the 10-day injured list.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to Tacoma Rainiers.

Buddy Kennedy — Seattle Mariners designated 1B Buddy Kennedy for assignment.

Similien Senatus — Seattle Mariners signed free agent RHP Similien Senatus to a minor league contract.

Alex Hoppe — Seattle Mariners recalled RHP Alex Hoppe from Tacoma Rainiers.

Nick Davila — Seattle Mariners optioned RHP Nick Davila to Tacoma Rainiers.

Miles Mastrobuoni — Seattle Mariners sent 3B Miles Mastrobuoni outright to Tacoma Rainiers.

Jacob Galloway — Seattle Mariners signed free agent C Jacob Galloway to a minor league contract.

Jake Harvey — Seattle Mariners signed free agent C Jake Harvey to a minor league contract.

Isaac Thornton — Seattle Mariners signed free agent RHP Isaac Thornton to a minor league contract.

Ace Reese — Seattle Mariners signed 3B Ace Reese.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to Everett AquaSox.

Kyle Boylston — Seattle Mariners signed free agent OF Kyle Boylston to a minor league contract.

Miles Mastrobuoni — Seattle Mariners designated 3B Miles Mastrobuoni for assignment.

Rob Refsnyder — Seattle Mariners sent DH Rob Refsnyder on a rehab assignment to Tacoma Rainiers.

Julio Rodríguez — Seattle Mariners activated CF Julio Rodríguez from the 7-day injured list.

Connor Marshburn — Seattle Mariners signed RHP Connor Marshburn.

Drew Whalen — Seattle Mariners signed RHP Drew Whalen.

Chris Torres — Seattle Mariners signed LHP Chris Torres.

Matthew Matthijs — Seattle Mariners signed RHP Matthew Matthijs.

Nathan Taylor — Seattle Mariners signed RHP Nathan Taylor.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to Tacoma Rainiers.

Hayden Yost — Seattle Mariners signed OF Hayden Yost.

Charlie Sutherland — Seattle Mariners signed OF Charlie Sutherland.

Michael Petite — Seattle Mariners signed OF Michael Petite.

Chris Diaz — Seattle Mariners signed RHP Chris Diaz.

Connor Marshburn — Seattle Mariners signed RHP Connor Marshburn.

Wyatt Queen — Seattle Mariners signed RHP Wyatt Queen.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to Tacoma Rainiers.

Anthony Treto — Seattle Mariners signed RHP Anthony Treto.

Mason Eckelman — Seattle Mariners signed C Mason Eckelman.

Eric Jeon — Seattle Mariners signed 2B Eric Jeon.

Ryan Wynn — Seattle Mariners signed SS Ryan Wynn.

Jake Brown — Seattle Mariners signed OF Jake Brown.

Henry Ford — Seattle Mariners signed 3B Henry Ford.

Trevor Lucas — Seattle Mariners signed 3B Trevor Lucas.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to ACL Mariners.

Carson Taylor — Seattle Mariners traded 1B Carson Taylor to Atlanta Braves.

Stuart Fairchild — CF Stuart Fairchild assigned to ACL Mariners from Seattle Mariners.

Mario Vasquez — Seattle Mariners signed free agent RHP Mario Vasquez to a minor league contract.

Stuart Fairchild — CF Stuart Fairchild roster status changed by Seattle Mariners.

Stuart Fairchild — Seattle Mariners signed free agent CF Stuart Fairchild to a minor league contract.

Miles Mastrobuoni — Seattle Mariners selected the contract of 3B Miles Mastrobuoni from Tacoma Rainiers.

Cooper Criswell — Seattle Mariners transferred RHP Cooper Criswell from the 15-day injured list to the 60-day injured list. Right shoulder strain.

Julio Rodríguez — Seattle Mariners placed CF Julio Rodríguez on the 7-day injured list. Concussion.

Cole Wilcox — Seattle Mariners recalled RHP Cole Wilcox from Tacoma Rainiers.

Josh Simpson — Seattle Mariners optioned LHP Josh Simpson to Tacoma Rainiers.

San Francisco Giants traded 1B Buddy Kennedy to Seattle Mariners for cash.

Rob Refsnyder — Seattle Mariners placed DH Rob Refsnyder on the 10-day injured list retroactive to June 27, 2026. Right knee inflammation.

Josh Simpson — Seattle Mariners recalled LHP Josh Simpson from Tacoma Rainiers.

Alex Hoppe — Seattle Mariners optioned RHP Alex Hoppe to Tacoma Rainiers.

Miles Mastrobuoni — Seattle Mariners sent 3B Miles Mastrobuoni outright to Tacoma Rainiers.

Connor Joe — Seattle Mariners optioned RF Connor Joe to Tacoma Rainiers.

Randy Arozarena — Seattle Mariners activated LF Randy Arozarena from the 10-day injured list.

Curtis Washington — Seattle Mariners sent CF Curtis Washington Jr. outright to Everett AquaSox.

Weston Wilson — Seattle Mariners selected the contract of 3B Weston Wilson from Tacoma Rainiers.

Miles Mastrobuoni — Seattle Mariners designated 3B Miles Mastrobuoni for assignment.

Adalberto Vallenilla — Seattle Mariners signed free agent RHP Adalberto Vallenilla to a minor league contract.

Ferny Barreda — Seattle Mariners signed free agent RHP Ferny Barreda to a minor league contract.

Connor Joe — Seattle Mariners recalled RF Connor Joe from Tacoma Rainiers.

Randy Dobnak — Seattle Mariners traded RHP Randy Dobnak to Kansas City Royals for cash.

Curtis Washington — Seattle Mariners optioned CF Curtis Washington Jr. to Everett AquaSox.

Curtis Washington — Seattle Mariners selected the contract of CF Curtis Washington Jr. from Everett AquaSox.

Jhonny Pereda — Seattle Mariners optioned C Jhonny Pereda to Tacoma Rainiers.

Randy Arozarena — Seattle Mariners placed LF Randy Arozarena on the 10-day injured list retroactive to June 13, 2026. Left hamstring strain.

Cal Raleigh — Seattle Mariners activated C Cal Raleigh from the 10-day injured list.

Will Wilson — Seattle Mariners transferred 3B Will Wilson from the 10-day injured list to the 60-day injured list. Left thumb fracture.

J.P. Crawford — Seattle Mariners activated SS J.P. Crawford from the 10-day injured list.

Domingo Gonzalez — Seattle Mariners sent RHP Domingo Gonzalez outright to Tacoma Rainiers.

Yosver Zulueta — Seattle Mariners traded RHP Yosver Zulueta to Chicago Cubs for cash.

Patrick Wisdom — Seattle Mariners optioned 3B Patrick Wisdom to Tacoma Rainiers.

Weston Wilson — Seattle Mariners signed free agent 3B Weston Wilson to a minor league contract.

Michael Plassmeyer — Seattle Mariners signed free agent LHP Michael Plassmeyer to a minor league contract.

Connor Wilford — Seattle Mariners acquired RHP Connor Wilford from the Lexington Legends of the Atlantic League.

Michael Rucker — Seattle Mariners selected the contract of RHP Michael Rucker from Tacoma Rainiers.

Domingo Gonzalez — Seattle Mariners designated RHP Domingo Gonzalez for assignment.

Carson Fulmer — Pittsburgh Pirates traded RHP Carson Fulmer to Seattle Mariners for cash.

Ryan Bliss — Seattle Mariners optioned 2B Ryan Bliss to Tacoma Rainiers.

Domingo Gonzalez — Seattle Mariners recalled RHP Domingo Gonzalez from Tacoma Rainiers.

Matt Brash — Seattle Mariners placed RHP Matt Brash on the 15-day injured list retroactive to June 9, 2026. Right lat strain.

Yosver Zulueta — Seattle Mariners designated RHP Yosver Zulueta for assignment.

Miles Mastrobuoni — Seattle Mariners activated 3B Miles Mastrobuoni from the 60-day injured list.

Nick Davila — Seattle Mariners recalled RHP Nick Davila from Tacoma Rainiers.

Will Wilson — Seattle Mariners sent 3B Will Wilson on a rehab assignment to Tacoma Rainiers.

Cooper Criswell — Seattle Mariners placed RHP Cooper Criswell on the 15-day injured list. Right shoulder strain.

Cal Raleigh — Seattle Mariners sent C Cal Raleigh on a rehab assignment to Tacoma Rainiers.

Ryan Bliss — Seattle Mariners recalled 2B Ryan Bliss from Tacoma Rainiers.

J.P. Crawford — Seattle Mariners placed SS J.P. Crawford on the 10-day injured list retroactive to June 6, 2026. Right hand contusion.

Cal Raleigh — Seattle Mariners sent C Cal Raleigh on a rehab assignment to Everett AquaSox.

Magz German — Seattle Mariners signed free agent SS Magz German to a minor league contract.

Will Wilson — Seattle Mariners sent 3B Will Wilson on a rehab assignment to Everett AquaSox.

Caleb Franzen — Seattle Mariners signed free agent LHP Caleb Franzen to a minor league contract.

Miles Mastrobuoni — Seattle Mariners sent 3B Miles Mastrobuoni on a rehab assignment to Tacoma Rainiers.

Miles Mastrobuoni — Seattle Mariners sent 3B Miles Mastrobuoni on a rehab assignment to Tacoma Rainiers.

Nick Davila — Seattle Mariners optioned RHP Nick Davila to Tacoma Rainiers.

Gabe Speier — Seattle Mariners activated LHP Gabe Speier from the 15-day injured list.

Miles Mastrobuoni — Seattle Mariners sent 3B Miles Mastrobuoni on a rehab assignment to ACL Mariners.

Gabe Speier — Seattle Mariners sent LHP Gabe Speier on a rehab assignment to Tacoma Rainiers.

Connor Joe — Seattle Mariners optioned RF Connor Joe to Tacoma Rainiers.

Victor Robles — Seattle Mariners activated RF Victor Robles from the 10-day injured list.

Robinson Ortiz — Seattle Mariners optioned LHP Robinson Ortiz to Tacoma Rainiers.

Matt Brash — Seattle Mariners activated RHP Matt Brash from the 15-day injured list.

Gabe Speier — Seattle Mariners sent LHP Gabe Speier on a rehab assignment to Everett AquaSox.

Gabe Speier — Seattle Mariners sent LHP Gabe Speier on a rehab assignment to Everett AquaSox.

Robinson Ortiz — Seattle Mariners recalled LHP Robinson Ortiz from Tacoma Rainiers.

Brennen Davis — Seattle Mariners selected the contract of CF Brennen Davis from Tacoma Rainiers.

Leo Rivas — Seattle Mariners optioned 3B Leo Rivas to Tacoma Rainiers.

Domingo Gonzalez — Seattle Mariners optioned RHP Domingo Gonzalez to Tacoma Rainiers.

Brennen Davis — Seattle Mariners optioned CF Brennen Davis to Tacoma Rainiers.

Patrick Wisdom — Seattle Mariners activated 1B Patrick Wisdom from the 10-day injured list.

Colt Emerson — Seattle Mariners recalled SS Colt Emerson from Tacoma Rainiers.

Brendan Donovan — Seattle Mariners placed 3B Brendan Donovan on the 10-day injured list retroactive to May 16, 2026. Left groin muscle strain.

Josh Simpson — Seattle Mariners optioned LHP Josh Simpson to Tacoma Rainiers.

José Suarez — Seattle Mariners traded LHP José Suarez to Athletics for cash.

Jhonny Pereda — Seattle Mariners recalled C Jhonny Pereda from Tacoma Rainiers.

Cal Raleigh — Seattle Mariners placed C Cal Raleigh on the 10-day injured list. Right oblique strain.

José A. Ferrer — Seattle Mariners activated LHP José A. Ferrer from the paternity list.

Matt Brash — Seattle Mariners sent RHP Matt Brash on a rehab assignment to Tacoma Rainiers.

Matt Brash — Seattle Mariners sent RHP Matt Brash on a rehab assignment to Tacoma Rainiers.

Bryce Miller — Seattle Mariners activated RHP Bryce Miller from the 15-day injured list.

José Suarez — Seattle Mariners designated LHP José Suarez for assignment.

Domingo Gonzalez — Seattle Mariners recalled RHP Domingo Gonzalez from Tacoma Rainiers.

José A. Ferrer — Seattle Mariners placed LHP José A. Ferrer on the paternity list.

Rhylan Thomas — Houston Astros claimed LF Rhylan Thomas off waivers from Seattle Mariners.

Jhonny Pereda — Seattle Mariners optioned C Jhonny Pereda to Tacoma Rainiers.

Scott Rouse — Seattle Mariners signed free agent RHP Scott Rouse to a minor league contract.

Brendan Donovan — Seattle Mariners activated 3B Brendan Donovan from the 10-day injured list.

Sam Whiting — Seattle Mariners signed free agent RHP Sam Whiting to a minor league contract.

Dominic Castellano — Seattle Mariners signed LHP Dominic Castellano.

Bryce Miller — Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Everett AquaSox.

Cole Cheatham — Seattle Mariners signed free agent LHP Cole Cheatham to a minor league contract.

Patrick Wisdom — Seattle Mariners sent 1B Patrick Wisdom on a rehab assignment to Tacoma Rainiers.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to Arkansas Travelers.

Brendan Donovan — Seattle Mariners sent 3B Brendan Donovan on a rehab assignment to Arkansas Travelers.

Josh Simpson — Seattle Mariners recalled LHP Josh Simpson from Tacoma Rainiers.

Cole Wilcox — Seattle Mariners optioned RHP Cole Wilcox to Tacoma Rainiers.

José Suarez — Seattle Mariners activated LHP José Suarez.

Gabe Speier — Seattle Mariners placed LHP Gabe Speier on the 15-day injured list retroactive to May 3, 2026. Left shoulder inflammation.

José Suarez — Seattle Mariners claimed LHP José Suarez off waivers from Atlanta Braves.

Rhylan Thomas — Seattle Mariners designated LF Rhylan Thomas for assignment.

Victor Robles — Seattle Mariners sent RF Victor Robles on a rehab assignment to Tacoma Rainiers.

Jhonny Pereda — Seattle Mariners recalled C Jhonny Pereda from Tacoma Rainiers.

Josh Simpson — Seattle Mariners optioned LHP Josh Simpson to Tacoma Rainiers.

Nick Davila — Seattle Mariners selected the contract of RHP Nick Davila from Arkansas Travelers.

Will Wilson — Seattle Mariners placed 3B Will Wilson on the 10-day injured list retroactive to April 30, 2026. Left thumb fracture.

Adam Smith — Seattle Mariners purchased contract of RHP Adam Smith.

Josh Simpson — Seattle Mariners recalled LHP Josh Simpson from Tacoma Rainiers.

Matt Brash — Seattle Mariners placed RHP Matt Brash on the 15-day injured list retroactive to April 30, 2026. Right lat inflammation.

Bryce Miller — Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Tacoma Rainiers.

Casey Legumina — Seattle Mariners traded RHP Casey Legumina to Tampa Bay Rays for RHP Ty Cummings.

Bryce Miller — Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Everett AquaSox.

Bryce Miller — Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Everett AquaSox.

Nick Hull — Seattle Mariners signed free agent RHP Nick Hull to a minor league contract.

Blas Castano — Colorado Rockies claimed RHP Blas Castaño off waivers from Seattle Mariners.

Alex Hoppe — Seattle Mariners recalled RHP Alex Hoppe from Tacoma Rainiers.

Casey Legumina — Seattle Mariners designated RHP Casey Legumina for assignment.

Will Wilson — Seattle Mariners selected the contract of 3B Will Wilson from Tacoma Rainiers.

Brendan Donovan — Seattle Mariners placed 2B Brendan Donovan on the 10-day injured list retroactive to April 18, 2026. Left groin muscle strain.

Miles Mastrobuoni — Seattle Mariners placed 3B Miles Mastrobuoni on the 60-day injured list. Right calf strain.

Bryce Miller — Seattle Mariners sent RHP Bryce Miller on a rehab assignment to Tacoma Rainiers.

Patrick Wisdom — Seattle Mariners placed 1B Patrick Wisdom on the 10-day injured list retroactive to April 15, 2026. Left oblique strain.

Rob Refsnyder — Seattle Mariners activated RF Rob Refsnyder from the paternity list.

Connor Joe — Seattle Mariners activated RF Connor Joe.

Cooper Criswell — RHP Cooper Criswell changed number to 88.

Brendan Donovan — 2B Brendan Donovan changed number to 33.

J.P. Crawford — SS J.P. Crawford changed number to 3.

Luis Castillo — RHP Luis Castillo changed number to 58.

Mitch Garver — C Mitch Garver changed number to 18.

Casey Legumina — RHP Casey Legumina changed number to 64.

Connor Joe — 1B Connor Joe changed number to 9.

Logan Gilbert — RHP Logan Gilbert changed number to 36.

George Kirby — RHP George Kirby changed number to 68.

Emerson Hancock — RHP Emerson Hancock changed number to 26.

Josh Naylor — 1B Josh Naylor changed number to 12.

Cal Raleigh — C Cal Raleigh changed number to 29.

Andrés Muñoz — RHP Andrés Muñoz changed number to 75.

Rob Refsnyder — RF Rob Refsnyder changed number to 30.

Gabe Speier — LHP Gabe Speier changed number to 55.

Julio Rodríguez — CF Julio Rodríguez changed number to 44.

Leo Rivas — 2B Leo Rivas changed number to 76.

Luke Raley — RF Luke Raley changed number to 20.

Cole Wilcox — RHP Cole Wilcox changed number to 43.

Cole Young — 2B Cole Young changed number to 2.

Bryan Woo — RHP Bryan Woo changed number to 22.

Patrick Wisdom — 1B Patrick Wisdom changed number to 35.

Dominic Canzone — Seattle Mariners activated DH Dominic Canzone.

Dominic Canzone — RF Dominic Canzone changed number to 8.

Randy Arozarena — LF Randy Arozarena changed number to 56.

Eduard Bazardo — RHP Eduard Bazardo changed number to 83.

Matt Brash — RHP Matt Brash changed number to 47.

José A. Ferrer — LHP Jose A. Ferrer changed number to 45.

Gabe Speier — LHP Gabe Speier changed number to 42.

Connor Joe — 1B Connor Joe changed number to 42.

Cal Raleigh — C Cal Raleigh changed number to 42.

Mitch Garver — C Mitch Garver changed number to 42.

Dominic Canzone — RF Dominic Canzone changed number to 42.

George Kirby — RHP George Kirby changed number to 42.

Julio Rodríguez — CF Julio Rodríguez changed number to 42.

Emerson Hancock — RHP Emerson Hancock changed number to 42.

Matt Brash — RHP Matt Brash changed number to 42.

Bryan Woo — RHP Bryan Woo changed number to 42.

Logan Gilbert — RHP Logan Gilbert changed number to 42.

Cooper Criswell — RHP Cooper Criswell changed number to 42.

Eduard Bazardo — RHP Eduard Bazardo changed number to 42.

Jesus Rondon — Seattle Mariners signed free agent RHP Jesus Rondon to a minor league contract.

Josh Naylor — 1B Josh Naylor changed number to 42.

Andrés Muñoz — RHP Andrés Muñoz changed number to 42.

José A. Ferrer — LHP Jose A. Ferrer changed number to 42.

Randy Arozarena — LF Randy Arozarena changed number to 42.

Leo Rivas — 2B Leo Rivas changed number to 42.

Rob Refsnyder — RF Rob Refsnyder changed number to 42.

Luke Raley — RF Luke Raley changed number to 42.

Luis Castillo — RHP Luis Castillo changed number to 42.

Cole Wilcox — RHP Cole Wilcox changed number to 42.

Cole Young — 2B Cole Young changed number to 42.

Casey Legumina — RHP Casey Legumina changed number to 42.

Brendan Donovan — 2B Brendan Donovan changed number to 42.

J.P. Crawford — SS J.P. Crawford changed number to 42.

Patrick Wisdom — Seattle Mariners selected the contract of 1B Patrick Wisdom from Tacoma Rainiers.

Rob Refsnyder — Seattle Mariners placed RF Rob Refsnyder on the paternity list.

Blas Castano — Seattle Mariners designated RHP Blas Castaño for assignment.

Connor Joe — Seattle Mariners selected the contract of RF Connor Joe from Tacoma Rainiers.