Mariners hire Jason Kanzler as manager, a first-time skipper focused on player development

The Seattle Mariners have hired Jason Kanzler as their new manager, making an unusually youthful and unconventional choice after a disappointing season. The club announced the hire Nov. 3 and introduced Kanzler at T-Mobile Park on Nov. 4, according to the team and MLB.com.

Kanzler, 36, becomes the Mariners’ 22nd manager in franchise history and 19th full-time manager, the team said. He is also a first-time manager at any level, according to MLB.com’s coverage of his introductory news conference, a striking detail for a team trying to rebound after going 76-86 in 2026. Seattle made the change after Dan Wilson did not return, following a season that came one year after the Mariners reached the American League Championship Series in 2025.

The hire reflects what Seattle said it wanted from its search: a leader who could connect player development with the major league clubhouse and communicate effectively across the organization. Rather than turn to a more traditional veteran skipper, the Mariners chose a development-focused executive whose résumé is rooted in coaching and organizational instruction.

“Our goal in this process was finding a manager with the ability to challenge all of us to improve,” president of baseball operations Jerry Dipoto said in the team’s Nov. 3 announcement. “Jason has the mindset, expertise, communication skills, and intensity to help create a championship standard here in Seattle.”

General manager Justin Hollander cast the decision in similar terms.

“Throughout the process, Jason consistently demonstrated elite leadership skills, high-end content and an ability to connect and partner with players, staff and front office,” Hollander said in the same release. “We all believe Jason is the right person to lead our organization back to the Postseason.”

Kanzler most recently served as the Chicago Cubs’ director of player development from 2024 through 2026. Before that, he worked in the Houston Astros organization, including on the major league staff in 2022, when Houston won the World Series, and as the club’s assistant hitting coach in 2023. Earlier, he held player-development and coaching roles in Houston’s minor league system from 2019 to 2021.

His route to a major league manager’s office was far from standard. Kanzler, who is from Penfield, New York, near Rochester, attended the University at Buffalo and earned a degree in psychology. He was drafted by the Minnesota Twins in the 20th round in 2013 and played three minor league seasons. He later worked as a high school physics and chemistry teacher in suburban Houston before moving fully into professional coaching.

At his introductory news conference, Kanzler leaned into that background rather than trying to minimize it.

“I bring a unique path, a unique set of skills and experiences. I am not the traditional path towards managing. I'm the right man because I believe that every player and every person can be better, and I think these players so deeply want to be better, and to grow and to win as a unit -- and I'm excited to get that out of them,” Kanzler said.

That combination of teaching, development and communication appears to be central to Seattle’s bet. After a 76-86 season that fell short of expectations, the Mariners chose a manager whose experience has been built less around in-game managing and more around helping players improve.

MLB.com reported that the Mariners interviewed multiple finalists for the job; the other publicly reported finalist was Joe Espada. The team did not disclose contract terms.

“I realized I wanted to manage during this process ... This is just at a way higher magnitude, with brighter lights with a third deck,” Kanzler said. “But in the end, it's the same. I want to win. I want to develop people, and I want to develop players, and I want to achieve something with a collective and a great group of people around me.”