When Does Spring Training Start 2025 Arizona. On tuesday, mlb announced official spring training start dates for all 30 clubs, the arizona diamondbacks included. Major league baseball announced on thursday that 2025 spring training will officially begin on thursday, feb.
Spring training ends on march 25 with a game between the cleveland guardians and arizona diamondbacks in the cactus league. The first spring training game in arizona in 2025 is scheduled for thursday, feb.