Athletics at Seattle Mariners: Final Score & Recap

The Athletics handed the Seattle Mariners a 6-2 defeat at T-Mobile Park on September 5, 2026, steadily dismantling a club that entered the day as a 60 percent favorite according to the DiamondIQ model's estimate. Oakland built its lead methodically across the early innings, scoring in the second and third before doing its most significant damage in the fourth, and the Mariners never found a path back into the game.

The fourth inning proved to be the decisive stretch of the contest. Max Muncy's single off George Kirby shifted win probability 8.4 percent in Oakland's favor, the single largest swing of the game, and a Donovan Walton double later in the same inning added another 7.0 percent. Those back-to-back blows off Kirby effectively broke the game open. Henry Bolte had already set an early tone with a double in the third that moved the needle 6.2 percent Oakland's way. Seattle's best chance to claw back came in the seventh, when Josh Naylor grounded into a double play against Jeffrey Springs, a sequence that swung 7.2 percent against the Mariners and extinguished whatever momentum they might have generated. Taylor Ward's strikeout in the second, a 6.9 percent swing against Seattle, was similarly deflating in a game the home side never led.

Muncy finished as the game's top offensive performer with a cumulative WPA of plus 12.9 percent and an RE24 of plus 1.6, while Walton contributed plus 10.1 percent WPA. On the Seattle side, Cal Raleigh provided the lone bright spot among hitters at plus 5.6 percent WPA and plus 1.0 RE24. The pitching story, however, belonged entirely to Jeffrey Springs, whose plus 34.2 percent WPA figure towered over every other contributor in the game and underscored how thoroughly he controlled the Mariners' offense across his time on the mound.