The 2025 season will see two Major League teams playing their home games in Minor League ballparks.
The Athletics will playing in Sacramento for at least three seasons, until their new home in Vegas is built (if that ever happens)
Due to the damage to Tropicana Field during the recent hurricane, the Tampa Rays will now play at Steinbrenner Field, the Spring Training site of the Yankees.
The aim is for this to just be for 2025, but I really don't see the point in spending an estimated $55m on repairing the Trop, when it's due to be replaced in a few years.
Having said that, I wouldn't fancy being a a daytime game at Steinbrenner Field in July/August. That'll be oppressively hot.