Mariners Game Preview and Discussion: Red Sox at Mariners

June 21, 2026 - 20:31

Seattle heads into Sunday's matchup with a sour taste after dropping the first two games of the series to the Red Sox. The Mariners offense has gone quiet again, managing just three runs across the first two contests. Now they face a tough task: avoiding a sweep against a Boston rotation that is throwing nothing but left-handed arms at them.

The Red Sox are lining up three straight southpaws for this series, and so far, it has worked. Seattle's lineup has struggled against left-handed pitching all season, and this weekend has been no different. The bats have looked lost, chasing pitches outside the zone and failing to string together timely hits. The Mariners will need to adjust quickly if they want to salvage the final game.

On the mound, Seattle sends out a starter who has been solid but not spectacular. He will need to keep the Red Sox offense in check, especially early, to give the lineup a chance to find some rhythm. Boston's bats have been opportunistic, taking advantage of mistakes and putting pressure on the Mariners defense.

The key for Seattle is simple: get to the Boston bullpen early and avoid falling behind. If the Mariners can scratch across a few runs and keep the game close, they have a shot. But if the offense continues to sputter against lefties, it will be a long afternoon at T-Mobile Park. First pitch is set for 1:10 PM local time.