The Mariners wasted no time reshaping their coaching staff after Dan Wilson’s exit, and the changes came in a rush. One day after Wilson’s tenure ended, Seattle announced that bench coach Manny Acta, infield coach Perry Hill, hitting coach Kevin Seitzer and first-base coach Eric Young Jr. will not return in 2027.
That is a major teardown, not a routine offseason shuffle. Before the club has even hired its next manager, it has already cleared out four familiar voices from the dugout.
Acta and Hill, especially, were longtime presences. Acta spent 11 seasons on the Mariners’ major-league staff, working under Scott Servais and Wilson, while Hill was in Seattle for eight seasons and helped J.P.
Crawford, Evan White and Dylan Moore win Gold Gloves.
Seitzer and Young were newer to the group, each spending two seasons on the major-league staff. Their exits widen the overhaul beyond one area of the game, reaching the hitting work, the infield instruction and the basepaths.
President of Baseball Operations Jerry Dipoto and General Manager Justin Hollander announced the staff changes, and Dipoto said the Mariners determined that “significant changes are required as we look toward 2027 and beyond.”
The scale of the reset matches the kind of season Seattle just endured. The Mariners finished 76-86 after entering the year with World Series expectations.
The offense never lived up to the hype, the rotation became unreliable, the bullpen unraveled and the defense finished as baseball’s worst by most advanced measurements. By the time the season was over, accountability had become a constant theme.
Hill’s departure stands out the most on paper. He has long been regarded as one of the game’s top infield instructors, and the Mariners had plenty of proof of that over the years.
But 2026 was a mess defensively, and Seattle clearly decided that continuity was not enough. A new voice mattered more than another season of familiarity.
Acta’s exit carries its own weight. He was one of the final major links to multiple eras of the Dipoto-led Mariners, and removing him gives the next manager more room to set a different tone. The organization clearly wanted to break from the old structure rather than tweak around the edges.
Seitzer’s departure felt like the most predictable of the four. Assistant hitting coach Bobby Magallanes had already been dismissed in July, and the offense never found a way to rebound after that. Keeping Seitzer would have required the club to make a strong case for more of the same.
Seattle is reportedly retaining director of pitching strategy Trent Blank and pitching coach Pete Woodworth, both of whom are under contract for two more seasons. That makes sense given how strong the pitching side has been for the organization in recent years.
The remaining openings are expected to stay open until the Mariners hire their next manager. That gives the new skipper a real chance to shape the staff instead of inheriting a group built entirely from above. If Seattle wants a different clubhouse voice, it has created the space for one to bring in coaches who fit.
Dipoto promised significant change, and the Mariners have delivered it in a hurry. A manager and four coaches are gone. What comes next has to be more than turnover.
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