Mariners dismiss four coaches as Seattle overhauls staff ahead of 2027

The Seattle Mariners announced the dismissal of four coaches — bench coach Manny Acta, infield coach Perry Hill, hitting coach Kevin Seitzer, and first base coach Eric Young Jr. — as the organization begins reshaping its dugout for 2027.

What happened

The club made the announcement in a press release, with president of baseball operations Jerry Dipoto framing the departures as a deliberate reset. Dipoto expressed lasting respect and appreciation for each of the four coaches, crediting them with meaningful contributions, while stating that after considerable reflection the organization had determined significant changes were necessary looking toward 2027 and beyond.

The move arrives days after it was reported that manager Dan Wilson will not return after the 2026 season, meaning Seattle is now rebuilding its entire dugout leadership structure. The coaching dismissals, announced by the club, extend what had already become a significant organizational inflection point.

Why it matters

The backdrop is a 76-86 season from a team that entered 2026 as one of the American League's more credentialed contenders. Per Steve Adams at MLB Trade Rumors, the Mariners came within a hair of a World Series appearance in 2025, which made this year's finish land with particular weight. What sharpened the disappointment further, per MLB Trade Rumors, was the state of the AL West around them: the Houston Astros won the division with an 81-81 record. Seattle finished five games behind a division winner that finished at exactly even. That is the kind of arithmetic that tends to accelerate organizational decisions.

The coaching staff changes reflect that reckoning. It is always difficult to draw a clean line between a coaching staff's work and a team's results — MLB Trade Rumors acknowledges as much — but the Mariners clearly determined that the combination of outcomes and trajectory warranted a full reset in the dugout.

The numbers

Seattle's record sits at 76-86 (.469), placing the club third in the AL West, five games back, and eliminated from both the division race and the Wild Card race. The team's Wild Card ranking comes in at ninth, 8.0 relative to the cut line. The Mariners carry a two-game winning streak into the final days of the schedule, though the postseason picture closed well before that modest run began — the club was eliminated from 2026 playoff contention following a Texas Rangers win, per earlier reporting.

The offensive decline is part of what MLB Trade Rumors points to in contextualizing the staff changes. Seattle's collective hitting line dropped from .244/.320/.420 with a 113 wRC+ in 2025 — a mark that ranked behind only the Yankees — to .233/.314/.379 with a 102 wRC+ this season, a figure that barely placed the club in the top half of the league. That is a meaningful regression across every slash component, and it lands squarely in the portfolio of a hitting coach.

Where the club stands

At 76-86, the Mariners are playing out the string in third place in the AL West. The two-game winning streak offers a minor note of late-season dignity, but the organizational story has already moved past the standings. With Wilson's departure reported and four coaches now let go per the club's announcement, Seattle is effectively operating in transition mode for the remainder of the schedule.

Who is leaving, and what did they bring?

Manny Acta's connection to the Mariners organization stretches back to 2016, when he was hired as third base coach under then-manager Scott Servais, per MLB Trade Rumors. He spent years in that role before Servais was fired in August 2024 and replaced by Wilson. Heading into 2025, Acta shifted to bench coach — a role he held for two seasons. His broader résumé, per MLB Trade Rumors, includes stints as third base coach for the Expos from 2002 to 2004 and the Mets in 2005 and 2006, followed by managerial tenures in Washington and Cleveland spanning from 2007 through 2012. He has been a fixture in professional dugouts for most of this century.

Kevin Seitzer brought nearly two decades of hitting coach experience to Seattle, having previously worked with Arizona, Kansas City, Toronto, and Atlanta, per MLB Trade Rumors. He was hired by the Mariners heading into 2025, meaning his tenure covered exactly the two seasons in which the offensive numbers tracked above. The drop from a 113 wRC+ to a 102 wRC+ over that span will follow the conversation about his departure, though MLB Trade Rumors is careful not to assign causation.

Eric Young Jr. served as first base coach for the Nationals in 2022 and 2023 before the Mariners brought him aboard for the same role heading into 2025, per MLB Trade Rumors. Like Seitzer, his Seattle tenure covered two seasons.

Perry Hill is among the four departures named in the club's announcement. The Mariners have not elaborated beyond the press release.

What we don't know yet

The Mariners have not announced a managerial hire, and no candidates for any of the four coaching vacancies have been reported. The timeline for those searches, the structure of the new staff, and who will lead the dugout in 2027 all remain open questions. MLB Trade Rumors does not indicate whether any of the departing coaches are expected to land elsewhere, nor does it address whether any internal candidates are under consideration.

The organizational picture has had other complications in the final weeks of the season. Andres Muñoz was placed on the IL with right knee inflammation, ending his season, per earlier reporting. Pitcher Kade Anderson left a game after being struck by a 103.8 mph line drive on his pitching forearm, per prior coverage. Neither situation has been connected to the coaching decisions in the club's announcement, but both are part of the broader context of a difficult September in Seattle.

What to watch

The managerial search is the headline item. Whoever Seattle hires to replace Wilson will have significant input — formally or informally — on the shape of the coaching staff around them, which makes the order of operations worth monitoring. Does the club hire a manager first and let that person shape the staff, or do some coaching hires precede the managerial decision? The Mariners have not indicated their process publicly.

The hitting staff reconstruction will draw particular attention given the offensive regression documented by MLB Trade Rumors. A club that ranked near the top of the league offensively in 2025 and slid to the middle of the pack in 2026 will be expected to address that gap with intention. What that looks like — and who gets the assignment — is the first real signal of where the organization thinks the problem actually lives.

For a franchise that came close enough to a World Series in 2025 to feel the heat of it, the 2026 finish at 76-86 represents a significant step backward. The coaching changes are the first visible piece of the response. The rest of the offseason will determine whether they are the beginning of a coherent rebuild or simply the most visible part of a longer, quieter reckoning.