Seattle Mariners Spring Training 2025 Players. On thursday, during the mariners game against the tigers — the organization announced its schedule for 2025 spring training. Seattle will play 33 games in the cactus league beginning friday, february 21st, 2025, according to a news release sent out by the organization.

24 rows full seattle mariners roster for the 2025 season including position, height, weight, birthdate, years of experience, and college. 6 prospect) why he could contribute: