| Date | Player | POS | Transaction |
|---|---|---|---|
| Mar 25, 2026 | B. MillerBryce Miller | SP | Placed on 15-Day IL (Strained left oblique) |
| Mar 25, 2026 | M. GarverMitch Garver | DH | Purchased From Minors |
| Mar 25, 2026 | J. CrawfordJ.P. Crawford | SS | Placed on 10-Day IL (Right shoulder inflammation) |
| Mar 25, 2026 | A. KniznerAndrew Knizner | C | Refused Minor League Assignment - Free Agent |
| Mar 25, 2026 | M. MastrobuoniMiles Mastrobuoni | 3B | Placed on 10-Day IL (Strained right calf) |
| Mar 22, 2026 | J. PeredaJhonny Pereda | C | Sent to Minors |
| Mar 22, 2026 | C. WilcoxCole Wilcox | RP | Sent to Minors |
| Mar 22, 2026 | Y. ZuluetaYosver Zulueta | SP | Sent to Minors |
| Mar 21, 2026 | R. ThomasRhylan Thomas | OF | Sent to Minors |
| Mar 18, 2026 | A. HoppeAlex Hoppe | RP | Sent to Minors |
| Mar 14, 2026 | R. OrtizRobinson Ortiz | RP | Sent to Minors |
| Mar 14, 2026 | J. SimpsonJosh Simpson | RP | Sent to Minors |
| Mar 14, 2026 | T. TaylorTroy Taylor | P | Sent to Minors |
| Mar 11, 2026 | D. GonzalezDomingo Gonzalez | RP | Sent to Minors |
| Mar 11, 2026 | B. CastanoBlas Castano | SP | Sent to Minors |
| Mar 8, 2026 | R. LoutosRyan Loutos | RP | Sent to Minors |
| Mar 2, 2026 | J. NottinghamJacob Nottingham | DH | Signed to a Minor League Contract |
| Feb 24, 2026 | B. WhiteBrendan White | RP | Signed to a Minor League Contract |
| Feb 21, 2026 | A. LopezAlejo Lopez | 2B | Signed to a Minor League Contract |
| Feb 18, 2026 | M. GarverMitch Garver | DH | Signed to a Minor League Contract |
| Feb 16, 2026 | L. EvansLogan Evans | RP | Placed on 60-Day IL (Right elbow surgery - out for season) |
| Feb 16, 2026 | J. SimpsonJosh Simpson | RP | Traded From Miami (for cash considerations) |
| Feb 13, 2026 | H. RothHouston Roth | RP | Signed to a Minor League Contract |
| Feb 10, 2026 | J. DiazJhonathan Diaz | RP | Signed to a Minor League Contract |
| Feb 10, 2026 | C. JoeConnor Joe | RF | Signed to a Minor League Contract |
| Feb 2, 2026 | B. DonovanBrendan Donovan | 2B | Traded From St. Louis (for P Jurrangelo Cijntje, 3-team deal) |
| Jan 31, 2026 | B. O'KeefeBrian O'Keefe | C | Signed to a Minor League Contract |
| Jan 30, 2026 | W. WilsonWill Wilson | SS | Signed to a Minor League Contract |
| Jan 30, 2026 | J. ReetzJakson Reetz | C | Signed to a Minor League Contract |
| Jan 28, 2026 | J. DiazJhonathan Diaz | RP | Refused Minor League Assignment - Free Agent |
| Jan 27, 2026 | J. KowarJackson Kowar | RP | Designated for Assignment |
| Jan 27, 2026 | J. PeredaJhonny Pereda | C | Traded From Minnesota (for cash considerations) |
| Jan 23, 2026 | C. CriswellCooper Criswell | RP | Traded From NY Mets (for cash considerations) |
| Jan 23, 2026 | J. DiazJhonathan Diaz | RP | Designated for Assignment |
| Jan 22, 2026 | S. TaylorSamad Taylor | LF | Refused Minor League Assignment - Free Agent |
| Jan 22, 2026 | D. DunningDane Dunning | SP | Signed to a Minor League Contract |
| Jan 20, 2026 | B. MillerBryce Miller | SP | Signed ( 2026; Opt 2027)(avoids arbitration) |
| Jan 15, 2026 | M. RuckerMichael Rucker | RP | Signed to a Minor League Contract |
| Jan 15, 2026 | Y. ZuluetaYosver Zulueta | SP | Traded From Cincinnati (for RHP Dusty Revis) |
| Jan 8, 2026 | L. RaleyLuke Raley | RF | Signed ( 2026)(avoids arbitration) |
| Jan 8, 2026 | L. GilbertLogan Gilbert | SP | Signed ( 2026)(avoids arbitration) |
| Jan 8, 2026 | M. BrashMatt Brash | RP | Signed ( 2026)(avoids arbitration) |
| Jan 8, 2026 | G. SpeierGabe Speier | RP | Signed ( 2026)(avoids arbitration) |
| Jan 8, 2026 | G. KirbyGeorge Kirby | SP | Signed ( 2026)(avoids arbitration) |
| Jan 8, 2026 | R. ArozarenaRandy Arozarena | LF | Signed ( 2026)(avoids arbitration) |
| Jan 7, 2026 | P. WisdomPatrick Wisdom | 3B | Signed to a Minor League Contract |
| Dec 22, 2025 | R. RefsnyderRob Refsnyder | LF | Signed as Free Agent ( 2026)(one-year contract) |
| Dec 16, 2025 | A. KniznerAndrew Knizner | C | Signed as Free Agent ( 2026)(one-year contract) |
| Dec 6, 2025 | J. FerrerJose Ferrer | RP | Traded From Washington (for C Harry Ford & RHP Isaac Lyon) |
| Nov 27, 2025 | C. LawrenceCasey Lawrence | RP | Signed to a Minor League Contract |
| Nov 22, 2025 | G. ZunigaGuillermo Zuniga | RP | Signed to a Minor League Contract |
| Nov 21, 2025 | G. SantosGregory Santos | RP | Not Offered Contract and Became Free Agent (non-tendered) |
| Nov 21, 2025 | T. SaucedoTayler Saucedo | RP | Not Offered Contract and Became Free Agent (non-tendered) |
| Nov 21, 2025 | T. ThorntonTrent Thornton | RP | Not Offered Contract and Became Free Agent (non-tendered) |
| Nov 18, 2025 | A. HoppeAlex Hoppe | RP | Traded From Boston (for C Luke Heyman) |
| Nov 18, 2025 | A. HoppeAlex Hoppe | RP | Purchased From Minors |
| Nov 18, 2025 | T. SaucedoTayler Saucedo | RP | Designated for Assignment |
| Nov 16, 2025 | J. NaylorJosh Naylor | 1B | Signed as Free Agent ( 2026-2030)(five-year contract) |
| Nov 16, 2025 | R. OrtizRobinson Ortiz | RP | Traded From Los Angeles (for RHP Tyler Gough) |
| Nov 11, 2025 | R. DobnakRandy Dobnak | RP | Signed to a Minor League Contract |
| Nov 6, 2025 | H. DannerHagen Danner | RP | Refused Minor League Assignment - Free Agent |
| Nov 6, 2025 | J. FlemingJosh Fleming | RP | Declared Free Agency |
| Nov 6, 2025 | J. LopezJack Lopez | 2B | Declared Free Agency |
| Nov 6, 2025 | N. AndersonNick Anderson | RP | Declared Free Agency |
| Nov 6, 2025 | M. MariotMichael Mariot | RP | Declared Free Agency |
| Nov 6, 2025 | A. ShentonAustin Shenton | 1B | Refused Minor League Assignment - Free Agent |
| Nov 6, 2025 | C. MarloweCade Marlowe | LF | Refused Minor League Assignment - Free Agent |
| Nov 6, 2025 | J. HahnJesse Hahn | RP | Declared Free Agency |
| Nov 6, 2025 | B. TaylorBeau Taylor | C | Declared Free Agency |
| Nov 6, 2025 | R. LoutosRyan Loutos | RP | Acquired Off Waivers From Washington |
| Nov 6, 2025 | C. SniderCollin Snider | RP | Refused Minor League Assignment - Free Agent |
| Nov 6, 2025 | J. NottinghamJacob Nottingham | DH | Declared Free Agency |
| Nov 6, 2025 | M. FulmerMichael Fulmer | RP | Declared Free Agency |
| Nov 5, 2025 | R. BlissRyan Bliss | SS | Removed From 60-Day IL (Torn right biceps) |
| Nov 5, 2025 | C. WilcoxCole Wilcox | RP | Traded From Tampa Bay (for cash considerations) |
| Nov 5, 2025 | J. PolancoJorge Polanco | 1B | Declared Free Agency (declined player option) |
| Nov 5, 2025 | T. ThorntonTrent Thornton | RP | Removed From 60-Day IL (Torn left Achilles) |
| Nov 5, 2025 | G. SantosGregory Santos | RP | Removed From 60-Day IL (Right knee inflammation) |
| Nov 4, 2025 | G. ZunigaGuillermo Zuniga | RP | Declared Free Agency |
| Nov 4, 2025 | A. MunozAndres Munoz | RP | Signed ( 2026)(team option exercised) |
| Nov 3, 2025 | M. GarverMitch Garver | DH | Declared Free Agency (mutual option declined) |
| Nov 2, 2025 | J. NaylorJosh Naylor | 1B | Declared Free Agency |
| Nov 2, 2025 | C. FergusonCaleb Ferguson | RP | Declared Free Agency |
| Nov 2, 2025 | L. JacksonLuke Jackson | RP | Declared Free Agency |
| Nov 2, 2025 | E. SuarezEugenio Suarez | 3B | Declared Free Agency |
| Oct 10, 2025 | L. TaverasLeody Taveras | CF | Refused Minor League Assignment - Free Agent |
| Oct 2, 2025 | J. JacquesJoe Jacques | RP | Refused Minor League Assignment - Free Agent |
| Sep 29, 2025 | C. LeguminaCasey Legumina | RP | Called Up from Minors |
| Sep 27, 2025 | C. LeguminaCasey Legumina | RP | Sent to Minors |
Overall 0-0 • AL • WEST 1st
Seattle Mariners
Seattle Mariners
- Athletics
- Arizona Diamondbacks
- Atlanta Braves
- Baltimore Orioles
- Boston Red Sox
- Chicago Cubs
- Chicago White Sox
- Cincinnati Reds
- Cleveland Guardians
- Colorado Rockies
- Detroit Tigers
- Houston Astros
- Kansas City Royals
- Los Angeles Angels
- Los Angeles Dodgers
- Miami Marlins
- Milwaukee Brewers
- Minnesota Twins
- New York Mets
- New York Yankees
- Philadelphia Phillies
- Pittsburgh Pirates
- San Diego Padres
- San Francisco Giants
- Seattle Mariners
- St. Louis Cardinals
- Tampa Bay Rays
- Texas Rangers
- Toronto Blue Jays
- Washington Nationals
- Overall0-0
- WEST1st
Seattle Mariners
- Athletics
- Arizona Diamondbacks
- Atlanta Braves
- Baltimore Orioles
- Boston Red Sox
- Chicago Cubs
- Chicago White Sox
- Cincinnati Reds
- Cleveland Guardians
- Colorado Rockies
- Detroit Tigers
- Houston Astros
- Kansas City Royals
- Los Angeles Angels
- Los Angeles Dodgers
- Miami Marlins
- Milwaukee Brewers
- Minnesota Twins
- New York Mets
- New York Yankees
- Philadelphia Phillies
- Pittsburgh Pirates
- San Diego Padres
- San Francisco Giants
- Seattle Mariners
- St. Louis Cardinals
- Tampa Bay Rays
- Texas Rangers
- Toronto Blue Jays
- Washington Nationals