Seattle Fired Dan Wilson and Several Coaches. The Mariners' Real Problem Hit .179.

The Seattle Mariners' 2026 season ended with a 7-3 win over the Angels, and roughly 24 hours later the fallout arrived in waves: manager Dan Wilson informed the club he wouldn't return in 2027, and Seattle then moved on from several members of his coaching staff. The franchise that stood one win from the World Series in October 2025 finished this season 76-86, third in the AL West, with a minus-58 run differential. The organization is framing the staff overhaul as a "culture reset," not a restart — but the numbers suggest something more structural than vibes went wrong.

The offense is where this collapsed

Seattle scored 664 runs in 2026 while allowing 722. A year ago, those numbers ran the other direction by a wide margin. The pitching staff, for its part, wasn't the disaster: a 4.20 team ERA, 1,389 strikeouts in 1,437.2 innings, and a bullpen that posted a 3.52 season ERA kept Seattle in far more games than a 76-win club typically deserves. The lineup simply didn't hold up its end.

The batting line is ugly across the board: a .233 average, .318 on-base percentage, .376 slugging, and a .694 OPS, with 1,467 strikeouts against just 628 walks. Seattle hit 186 home runs as a team.

Cal Raleigh's fall is the story of the season

You can trace the Mariners' decline almost directly to their catcher. In 2025, Cal Raleigh hit .247/.359/.589 with 60 home runs and 125 RBI over 159 games. In 2026, he hit .179/.294/.369 with 23 home runs and 68 RBI in 124 games, striking out 162 times in 442 at-bats. That is not a slump — it's the disappearance of the single most productive bat in the lineup, and it happened while the pitching staff held steady enough to contend.

Julio Rodríguez's year was less catastrophic but still a career low point: .250/.311/.407 with 22 homers, 70 RBI, and 22 steals across 148 games. A center fielder with a .718 OPS and declining defensive reviews is a problem Seattle has to solve, not merely hope away.

Injuries took a bite, but not the whole leg

The injured list wasn't kind. Closer Andrés Muñoz landed on the 15-day IL late in the year, Matt Brash spent time on the 60-day list, and Luke Raley, Emerson Hancock, Brendan Donovan, and Colt Emerson all occupied IL spots at various points. A recent power rating pegged Seattle 27th in the league with a minus-1.26 runs-neutral score, noting the injury adjustment only deepened an already thin roster. That's fair — but no injury list explains a .233 team average over 162 games.

What happens next

The immediate task is a managerial search, with the club's willingness to spend on that hire already a topic of debate. The bigger roster questions are well documented: left field, shortstop, and third base all need addressing, and the contention-window conversation in Seattle has turned openly fatalistic in some corners.

Two structural items loom over all of it. First, the collective bargaining agreement expires December 1, which injects real uncertainty into how aggressively any club — including this one — plans its winter. Second, general manager Jerry Dipoto now oversees a reset of the staff he helped assemble, which invites fair questions about how much runway that reset buys him.

Seattle doesn't lack a core. It lacks the production that core was supposed to provide. Until the bats — starting with Raleigh's — return to something resembling 2025, a new manager and a revamped coaching staff will be rearranging furniture in a room that still can't score.