Seattle Mariners defeat Boston Red Sox 9-6 at Fenway Park

The Seattle Mariners defeated the Boston Red Sox 9-6 on September 1, 2026, at Fenway Park. Boston managerially treated the contest as a rest day, utilizing multiple relief pitchers after starting Jedixson Paez, who allowed eight runs over 3.2 innings. Despite the loss, Boston forced Seattle to use closer Andres Munoz, potentially aiding the Red Sox for the remainder of the series. Mickey Gasper recorded another home run for Boston, continuing a recent streak of production. Teammates Trevor Story and Roman Anthony each contributed two hits in the effort. The Red Sox remain focused on postseason positioning despite the immediate outcome.

• 3:08 AMYahoo Sports — Mariners maul Red Sox as Boston plays the logistics game