The Seattle Mariners have announced their 2026 Opening Day roster, with a few surprises compared to the spring’s outset. The M’s have been fairly fortunate with their health through Spring Training, but will see expected starting SS J.P. Crawford and starting RHP Bryce Miller on the injured list to open the year. Both players are expected back early in April, but their absence has created openings for a few depth pieces. Additionally, UTIL Miles Mastrobuoni is out injured to start the year.
Catchers
Cal Raleigh,
Mitch Garver
This cat has been liberated from bag-hood for a few days now, with Garver beating out Andrew Knizner and Jhonny Pareda for the backstop role. Designating Knizner for assignment would clear the space for Garver in a straight swap, allowing the M’s to run back their expected alignment with Pareda the next man up in Tacoma.
Infielders
INF Ryan Bliss, 1B Josh Naylor, INF Leo Rivas, INF Cole Young
A month and change ago, and likely more, the role for Ryan Bliss on this club seemed narrow as a needle’s eye. Either Arachne blessed him or Athena misplaced her vengeance on Mastrobuoni and Crawford, but a healthy spring allowed Bliss to outlast top prospect Colt Emerson and the rest of the M’s infield depth. Emerson’s omission was foretold in his optioning a few days ago, but a decent spring didn’t do enough to force Seattle’s hand. He’ll return to Triple-A Tacoma to add to pick up on the week of games he received there at the end of 2025. Young and Rivas will both receive time at shortstop until Crawford returns.
Utility Players
UTIL Brendan Donovan, OF/1B Luke Raley, UTIL(?) Rob Refsnyder
The M’s starting third baseman has the versatility to cover every spot on the diamond (shortstop being a stretch), and Donovan gets inclusion in this category accordingly. Raley’s return to health looks like a major boon for the M’s and he can handle every outfield spot acceptably, hopefully allowing more DH days for Arozarena alongside Refsnyder. The question mark adjacent Refsnyder’s name is that defensively, he’s a tricky fit on this roster. He’s played every infield spot save shortstop, but none since 2020 (and nowhere but first base since 2017). Corner outfield is where the 35 year old to be (on Opening Day itself!) fits best, but clearly the club sees him at least spelling Naylor occasionally. Instincts over years of threadbare M’s clubs have made this an anxiety point, but the truth is the M’s bench is quite potent – Refsnyder mostly just is here to hit and that’s acceptable due to the versatility of so many of his teammates!
Outfielders
OF Randy Arozarena, cOF Dominic Canzone, OF Victor Robles, OF Julio Rodríguez
No surprises here. This group is the best set of outfielders in Seattle since Ichiro and Mike Cameron roamed the grass.
Starting Pitchers
RHP Logan Gilbert, RHP George Kirby, RHP Bryan Woo, RHP Luis Castillo, RHP Emerson Hancock
Again, chalk. The pitchers are listed here in order of their starts, with Seattle hoping Miller’s return can come measured in weeks and not disrupt his buildup too dramatically.
Bullpen
RHP Eduard Bazardo, RHP Matt Brash, RHP Cooper Criswell, LHP José A. Ferrer, RHP Casey Legumina, RHP Andrés Muñoz, LHP Gabe Speier, RHP Carlos Vargas
Once more, as expected. Seattle has opted in favor of just two new faces to start the year in the pen, with Ferrer a foregone conclusion as the newest high-leverage arm. His acquisition in exchange for a package led by C Harry Ford placed the ground-baller in the back end of the pen this winter. Criswell is the other newcomer, bringing a starting and bullpen background to a long relief role for the M’s. While Vargas and Legumina didn’t shine consistently a season ago, both players lack minor league options, and would have required potentially permanent jettisoning. Given the lack of standout popups from this spring, possibly excepting optionable RHP Cole Wilcox, this group is likely to see stability in the Bazardo-Brash-Ferrer-Speier-Muñoz group and turnover elsewhere, at least until health has its say.
