MLB · AL West · Est. 1977 · T-Mobile Park
Seattle Mariners
Current Leadership
Chairman & Managing Partner
John Stanton, a wireless telecommunications pioneer who co-founded Western Wireless and VoiceStream (later sold to T-Mobile), became the Mariners' chairman and managing partner in 2016. A longtime minority investor in the franchise, Stanton led the group that purchased the controlling interest from Nintendo of America. He has overseen significant investments in T-Mobile Park and the team's player development system, guiding the Mariners to their first playoff appearance in 21 years in 2022.
Investor Consortium
The Mariners' ownership group is a consortium of Pacific Northwest business leaders assembled by John Stanton. The group includes several prominent technology and business executives who are committed to keeping the franchise rooted in Seattle and investing in the team's competitiveness. The ownership has focused on community engagement and building a sustainable winner in the American League West.
Manager
| Name | Position | Since |
|---|---|---|
| Dan Wilson | Manager | 2024 |
Coaching Staff
| Name | Position | Since |
|---|---|---|
| Manny Acta | Bench Coach | 2023 |
| Pete Woodworth | Pitching Coach | 2024 |
| Kevin Seitzer | Hitting Coach | 2026 |
| Carlos Cardoza | Third Base Coach | 2026 |
| Eric Young Jr. | First Base Coach | 2025 |
Historical Figures
Former Majority Owner
Nintendo of America, led by the late Hiroshi Yamauchi, purchased a majority stake in the Mariners in 1992 to save the franchise from relocating out of Seattle. Nintendo's ownership provided financial stability during the golden era of Mariners baseball in the 1990s and 2000s, featuring stars like Ken Griffey Jr., Randy Johnson, Alex Rodriguez, and Ichiro Suzuki. The 2001 team's 116-win season remains an American League record. Nintendo gradually reduced its stake before selling its controlling interest to Stanton's group in 2016.
Former Owner
Jeff Smulyan, an Indianapolis media executive, purchased the Mariners in 1989 but struggled financially with the franchise. His attempts to relocate the team to Tampa Bay were blocked by local opposition and MLB intervention, ultimately leading to Nintendo's rescue purchase in 1992 that kept the Mariners in Seattle.