Mariners Spring Training 2025. Seattle mariners 2025 spring training at peoria stadium: Seattle will play 33 games in the cactus league beginning friday, february 21st, 2025, according to a news release sent out by the organization.

The complete 2025 mariners spring training schedule is available at mariners.com/spring. The mariners still need to find answers at first, second and third base before opening day arrives on march 27, 2025.