On June 3, 2025, the Orioles secured a convincing 5-1 victory over the Mariners, driven by Colton Cowser’s triumphant return from a broken thumb. Cowser, who had been sidelined, immediately made an impact by homering, demonstrating why Baltimore values his presence in the lineup. The Orioles, who have struggled with consistency this year, capitalized on strong performances by both their hitters and starter Tomoyuki Sugano, who improved his record to 5-3 with seven solid innings. The offense was steady, with Jackson Holliday and Adley Rutschman each collecting multiple hits, and the bullpen holding firm. This win snapped a difficult stretch for Baltimore, now sitting at 23-36 overall and 11-19 on the road. For a full breakdown of the game’s win probability and player stats, visit Orioles 5-1 Mariners (Jun 3, 2025) Final Score.
However, the Mariners responded with a tight 1-0 win on August 12, 2025, in Baltimore. George Kirby was the star, pitching seven innings of three-hit, shutout baseball while striking out seven and issuing no walks. His dominant outing lifted Seattle to their eighth consecutive victory, a streak that pulled them into a tie atop the AL West with the Houston Astros. The only run came in the first inning, when Randy Arozarena led off with a single, stole second, and scored on Josh Naylor’s clutch two-out RBI hit. Despite limited offensive production, the Mariners’ pitching staff, including Eduard Bazardo, Gabe Speier, and Andrés Muñoz, closed the door, with Muñoz earning his 28th save. The Orioles, for their part, were shut out for the 13th time in 2025, a figure reminiscent of their offensive struggles in previous rebuilding years. More game details and post-game reactions can be found on AP MLB.
Analyzing the last five meetings between these teams, the results reflect a series of closely contested matchups, with both sides relying on emerging young talent. The Orioles, standing at 53-66, have leaned on power from Cedric Mullins and Gunnar Henderson, while the Mariners, with a 67-53 record, continue to benefit from a rotation led by Kirby and Logan Gilbert. Statistically, the Mariners’ ERA and strikeout rates rank them among the league’s better pitching staffs, while the Orioles have struggled with a 4.85 team ERA, currently 27th in MLB. For a historical perspective and further stats on this matchup, refer to Orioles vs Mariners last 5 games.
Looking ahead, the Mariners’ momentum and superior pitching depth make them a strong candidate for postseason play, while the Orioles are seeking to rebuild around their core of young position players. Betting markets have started to favor Seattle in head-to-head matchups, especially when Kirby or Gilbert take the mound, given their ability to suppress runs and limit baserunners.
These contests underline the importance of pitching in tight games and how a single swing—like Cowser’s home run or Naylor’s RBI single—can define a series. With the season entering its final stretch, both franchises will be closely watched by fans and analysts, eager to see if Baltimore’s youth movement can translate into wins or if Seattle’s rotation can carry them to October.