The California League is about to undergo a significant makeover.

Diamond Baseball Holdings announced Thursday it has entered into an agreement to purchase the Rancho Cucamonga Quakes and will move the franchise to Ontario in 2026.

The Low-A affiliate of the Dodgers will play its final season in Rancho Cucamonga in 2025 before relocating to the new Ontario Sports Empire Complex, a 190-acre athletic complex currently under construction.

The Inland Empire 66ers, the Low-A affiliate of the Angels, will relocate from San Bernardino to Rancho Cucamonga in 2026. The Modesto Nuts, the Low-A affiliate of the Seattle Mariners, were also acquired by DBH on Thursday and will move from Modesto to San Bernardino.

“As a city, our council has been on the council for a while, and it’s been their dream to have professional baseball in Ontario,” said Dan Bell, the city of Ontario’s executive director of communications and community relations. “So to make that happen, finally, and have the agreement and have the team coming, it’s all locked in, we couldn’t be more excited.”

The yet-to-be-named Ontario club will play at a new, 6,500-seat minor league baseball stadium in the Ontario Sports Empire Complex set to open in April 2026. The city broke ground on the estimated $100 million stadium in October.

Rancho Cucamonga will become an Angels affiliate, as it was from 2001-10, and continue play at LoanMart Field. Inland Empire will become a Mariners affiliate and play at the existing San Manuel Stadium.

Modesto, which has been home to a California League franchise continuously since 1946, will be without a team after the 2025 season.

The long-rumored moves became official after months of speculation.