Modesto Nuts to Relocate to San Bernardino After 2025 Season

The Seattle Mariners sold their Class A affiliate to Diamond Baseball Holdings, marking the end of an 80-year minor league baseball legacy in Modesto.

The Modesto Nuts, a Class A affiliate of the Seattle Mariners, will move to San Bernardino in 2026 and be rebranded as the Inland Empire 66ers.
The relocation follows the Mariners' sale of the team to Diamond Baseball Holdings, which now owns 41 minor league teams across the U.S.
Modesto and the Mariners failed to reach a long-term lease agreement for the city-owned John Thurman Field, which required $32 million in upgrades to meet MLB standards.
The move is part of a broader reorganization of California League teams, with the Dodgers and Angels also realigning their minor league affiliates in the region.
Modesto officials plan to explore alternative uses for John Thurman Field, as the city prepares to bid farewell to its only professional sports team.