San Francisco Giants at Boston Red Sox: Final Score & Recap

The Boston Red Sox walked off the San Francisco Giants 3-2 at Fenway Park on August 22, 2026, in a game that remained tense through eight innings before exploding in the bottom of the ninth. The Giants carried a 2-0 lead into the final frame, and the DiamondIQ model's estimate of a Boston victory, which had opened at 67 percent before first pitch, had compressed significantly by that point. San Francisco scored once in the first and again in the third to build what appeared to be a durable cushion, but the Red Sox offense, held scoreless through eight innings, produced all three of their runs in a single dramatic sequence to end it.

The decisive moment of the game belonged to Nick Sogard, whose two-out double off Sam Hentges in the bottom of the ninth swung win probability by 55.1 percent, the single largest play of the night and the one that effectively transferred control of the game to Boston. Sogard finished as the top performer by WPA at plus-63.6 percent with a RE24 of plus-1.4, a commanding individual impact for a player who did his damage in the span of a few pitches. Wilyer Abreu followed with a fielder's choice that added another 16.9 percent to Boston's win probability, pushing the DiamondIQ model's estimate to 100 percent. Earlier, Mickey Gasper had contributed a double off Carson Seymour in the eighth for plus-12.4 percent WPA, laying groundwork for the rally. On the pitching side, Blade Tidwell led Boston's staff with plus-40.7 percent WPA, and Dylan Smith added plus-25.9 percent, including a stretch in the eighth where Adley Rutschman's flyout and Willson Contreras's strikeout each deflated San Francisco's chances by more than 15 percent apiece. The Giants finished with eight hits and no errors but were undone by a single inning they could not survive.