The Mariners are expected to turn to Jason Kanzler as their next manager, with Daniel Kramer of MLB.com reporting that Seattle is set to announce the hire on Tuesday.
At 36, Kanzler would become the second-youngest manager in baseball, trailing only Blake Butera of the Washington Nationals. It would also be his first managerial job at any professional level.
Kanzler arrives with a background that leans heavily toward player development. He spent time as a minor league and major league hitting coordinator for the Houston Astros, then spent the last three years as the director of player development for the Chicago Cubs.
That profile is part of what makes the hire appealing. Kanzler is viewed as a strong communicator, which is something the Mariners reportedly lacked in 2026.
He also has a track record of helping players grow, with his work in Houston tied to the rise of Jeremy Pena and Alex Bregman. Seattle will be hoping that same touch carries over with players such as Cal Raleigh, Julio Rodriguez and Josh Naylor.
His recent work in player development could also matter in a clubhouse that features a number of young players who may be asked to take on bigger roles. The idea is that development doesn’t stop once a player reaches the majors, and Kanzler has spent the last three years in a job built around that belief.
There’s also the front-office side of the fit. Kanzler speaks the language of the organization, which could make him a useful bridge with Jerry Dipoto and Justin Hollander.
Still, the hire comes with obvious questions. This would be the Mariners’ third straight first-time manager, following Scott Servais and Dan Wilson. Buster Olney of ESPN had argued the club needed someone with experience, which is why he appeared to favor Joe Espada.
And then there’s the age factor. At 36, Kanzler would be younger than many of the players he’d be managing. The question now is whether that age gap becomes an asset or a hurdle when it comes to earning respect and holding the room.
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