The Seattle Mariners return to T-Mobile Park on May 14, 2025, with a 23–18 record and a golden opportunity to take down the AL East-leading New York Yankees in the series finale of a tightly contested three-game set, relying on their deep pitching staff, improving offense, and the electric atmosphere of their home ballpark to secure a much-needed win as they look to reestablish dominance in the AL West. Despite a recent sweep at the hands of the Toronto Blue Jays, the Mariners have gone 6–4 ATS over their last 10 games and have found consistency at home, where the total has gone over in five of their last six, driven by the recent surge in production from their power hitters and opportunistic baserunning. Cal Raleigh has been the team’s most dangerous offensive weapon, blasting 13 home runs with a .557 slugging percentage to lead Seattle’s power game, while Julio Rodríguez is showing signs of getting hot again, with two home runs and 11 hits in his last 10 games, bringing much-needed balance to the lineup and forcing opposing pitchers to work deeper into counts. On the mound, the Mariners will turn to ace Luis Castillo, who enters the matchup with a 3–3 record and 3.95 ERA and remains the club’s most trusted starter, despite some recent inconsistency that has seen his strikeout totals remain solid but his pitch efficiency decline, a concern against a disciplined Yankees lineup that thrives on capitalizing early in counts.

Castillo’s success will hinge on his ability to get ahead with the fastball and mix his devastating changeup to keep sluggers like Aaron Judge, Paul Goldschmidt, and Cody Bellinger from settling into the box—especially Judge, who currently leads MLB in WAR and is dismantling every mistake he sees with a historic slash line. The Mariners have been strong defensively, making few errors and supporting their pitchers well with a fundamentally sound infield and a dynamic outfield that tracks down extra-base hits with ease, providing Castillo and the bullpen with the support needed to navigate tight games. Their bullpen, anchored by Andrés Muñoz, has continued to hold leads and close the door in late innings, and with the Yankees likely to press the rookie starter Will Warren into high-leverage situations early, Seattle’s offensive plan will be to jump on any command issues and get into the bullpen by the middle innings. Manager Scott Servais will look to use this finale to build momentum for his team, especially after a tough road stretch, and a win against one of the league’s hottest teams would reestablish Seattle’s credentials as a legitimate AL contender. With home-field energy, a confident ace, and an offense beginning to click, the Mariners will aim to control the tempo, play their brand of aggressive, no-mistake baseball, and close out the series with a win that reinforces their hold atop the division and signals they’re ready for the grind of the summer stretch.