Mariners hire Jason Kanzler, 36, as manager to replace Dan Wilson

The Seattle Mariners have hired Jason Kanzler as their new manager, a surprising choice given he has never managed a club at any level, according to the New York Post ^[1]. The 36-year-old, who served as the Chicago Cubs' director of player development, succeeds Dan Wilson, who was dismissed following a disappointing 76-86 campaign that ended the team's World Series aspirations. The Independent reported ^[3] that Kanzler will become the second-youngest manager in MLB history, trailing only Nationals skipper Blake Butera.

Kanzler’s path to the majors was unconventional. He spent the last three years overseeing the Cubs' minor league system, helping develop young talent like Matt Shaw and Pete Crow-Armstrong. Before that, he worked with the Houston Astros, where he served as an assistant hitting coach during their 2022 World Series championship run. The New York Post ^[1] noted that his work helped push the Astros' offense to third in the American League in runs per game. Prior to his coaching career, Kanzler taught high school chemistry and physics in Texas, a detail highlighted by The Independent ^[3].

The hire follows the dismissal of Dan Wilson, who led Seattle to the AL West title in 2025 before the team collapsed in 2026. ESPN reported ^[2] that the Mariners, stocked with superstars like Cal Raleigh and Julio Rodriguez, struggled with offensive regression and pitching issues, finishing five games back in the AL West. Jerry Dipoto, the Mariners' president of baseball operations, stated that Kanzler possesses the "mindset, expertise, communication skills, and intensity" to create a championship standard. General Manager Justin Hollander added that Kanzler demonstrated "elite leadership skills" during the interview process, according to ESPN.

Kanzler will inherit a roster with immense talent but significant questions. Slugger Cal Raleigh batted just .182 last season, while Rodriguez and Josh Naylor also suffered career-worst offensive campaigns. The Mariners are still the only MLB franchise never to reach the World Series. Former Astros manager Joe Espada was reportedly a finalist for the role but lost out to Kanzler, who is now tasked with diagnosing what went wrong in a year that saw almost all the team's best players struggle. Kanzler said he is "thrilled to join the Mariners organization" and looks forward to "accessing and unlocking this team’s full potential." He will begin his tenure when spring training opens against the Padres on Feb. 19 in Arizona.