Seattle Mariners at Athletics: Final Score & Recap

The Athletics walked off the Seattle Mariners 8-7 on September 13, 2026, at Sutter Health Park, completing a dramatic comeback that shifted the DiamondIQ model's estimate from a 48 percent pre-game home win probability all the way to 100 percent by the final out. Seattle had built a lead through the middle innings, scoring two in the third, three in the fourth, and one in the fifth to take a 6-0 advantage heading into the later frames, but Oakland chipped away with a four-run seventh and eventually forced a decisive ninth inning.

The single most consequential play of the game came in the bottom of the ninth, when Lawrence Butler launched a home run off Andrés Muñoz that swung win probability by plus 67.7 percent, turning what had been a tied or one-run game into an immediate Oakland victory. Muñoz had earlier seen Jeff McNeil's flyout in the eighth register as a minus 19.9 percent swing against the Athletics, reflecting how close Seattle came to closing things out. Randy Arozarena kept Seattle's hopes alive in the top of the eighth with a home run off Hogan Harris worth plus 21.3 percent win probability, while Shea Langeliers's single in the seventh off Seranthony Domínguez and Zack Gelof's walk off Gabe Speier, worth plus 18.7 and plus 17.2 percent respectively, were the key catalysts in Oakland's four-run rally that frame.

Butler finished as the game's top performer by WPA at plus 70.0 percent with a RE24 of plus 2.6, while Arozarena and Gelof each also posted plus 2.6 RE24 alongside strong WPA contributions of plus 46.0 and plus 31.3 percent respectively. On the pitching side, Elvis Alvarado led Athletics relievers with a plus 3.6 percent WPA, and Seattle's Bryce Miller contributed plus 2.7 percent in a losing effort. The model leans heavily toward crediting Butler's walk-off blast as the defining moment of a game that saw Oakland overcome a substantial multi-run deficit to steal a victory at home.