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Mastrobuoni's Grand Slam Highlights Mariners' Spring Training Excitement

2/22/2026

37 7 Full Breakdown

Summary

Story summary

Miles Mastrobuoni of the Seattle Mariners hit the team's first spring-training grand slam in the second Cactus League game, off San Francisco Giants pitcher Hayden Birdsong.
He is batting 3-for-4 in the spring.
Mastrobuoni appeared in 76 games last season.
Despite the strong start, he faces a challenge securing a spot on the opening-day roster amid a deep Mariners lineup.
Legendary broadcaster Rick Rizzs is retiring after this season.

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Story summary

Miles Mastrobuoni of the Seattle Mariners hit the team's first spring-training grand slam in the second Cactus League game, off San Francisco Giants pitcher Hayden Birdsong.
He is batting 3-for-4 in the spring.
Mastrobuoni appeared in 76 games last season.
Despite the strong start, he faces a challenge securing a spot on the opening-day roster amid a deep Mariners lineup.
Legendary broadcaster Rick Rizzs is retiring after this season.