Seattle Mariners News — Sat, Oct 31, 2026

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Today’s brief

The Seattle Mariners hired Washington Nationals assistant CJ Gillman as their new hitting coach, making a key staff addition while the club’s managerial search remains unresolved. In the minors, top prospect Michael Arroyo underwent elbow surgery, casting a shadow over his development timeline. The rest of the day was filled with speculative trade and roster chatter across the blogosphere.

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Minor League Baseball on SI · Fri 10:50 PM ET

Mariners Share Major Injury Update on Top Prospect Michael Arroyo — Infield prospect Michael Arroyo required an elbow procedure that threatens his preparation and availability heading into the upcoming minor league campaign.

Roundtable Sports · Fri 3:27 PM ET

Seattle Mariners Top 100 Prospect, Potential Starting Player Undergoes Elbow Surgery

Just outside the window — 14 items published before this window

Seattle Mariners exercise Andrés Muñoz's optionKCPQ · Thu 11:51 PM ET
Mariners Claim Grant McCray From Giants, but His Fresh Start Needs a Hitting PlanSeattle Mariners On SI · Thu 10:15 PM ET
Mariners exercise Andrés Muñoz's $9 million option, decline options on Victor Robles, Bryce MillerAssociated Press · Thu 9:29 PM ET
Seattle Mariners Decline Options of Two Players After World SeriesHEAVY · Thu 7:17 PM ET
3-Year San Francisco Giants Outfielder Claimed by MarinersHEAVY · Thu 6:54 PM ET
Jason Kanzler or Joe Espada? A LL staff discussion on the Mariners’ managerial finalistsSB Nation · Thu 5:58 PM ET
Seattle Mariners Offseason: One Big Decision For M's Due By Nov. 2Roundtable Sports · Thu 5:00 PM ET
Mariners pick up Andres Munoz contract, but declines 2 other optionsClutchPoints · Thu 4:59 PM ET
Mariners reach decisions on trio of club optionsSB Nation · Thu 4:05 PM ET
Seattle Mariners Make Contract Decisions on 3 PlayersRoundtable Sports · Thu 3:59 PM ET
Mariners' Muoz, Miller and Robles Decisions Begin to Set the Tone for 2027Seattle Mariners On SI · Thu 3:58 PM ET
Seattle Mariners Offseason: Four Players Officially Hit Free AgencyRoundtable Sports · Thu 2:00 PM ET
J.P. Crawford's Projected $20 Million Deal Creates a Mariners Reunion DilemmaSeattle Mariners On SI · Thu 1:28 PM ET
Under-the-radar Mariners coaching candidates from MLB (AL/NL West)SB Nation · Thu 12:00 PM ET

Compiled from Yahoo Sports’ Mariners pages · Team feed · Latest news · Schedule

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Top stories

Mariners reportedly hire CJ Gillman as hitting coach before settling on new manager — CJ Gillman arrives from Washington’s offensive staff to direct Seattle’s bats even as the front office has yet to name its next manager.

Featured

Mariners Share Major Injury Update on Top Prospect Michael Arroyo — Infield prospect Michael Arroyo required an elbow procedure that threatens his preparation and availability heading into the upcoming minor league campaign.

Seattle Mariners Top 100 Prospect, Potential Starting Player Undergoes Elbow Surgery