Philadelphia Phillies at Boston Red Sox: Final Score & Recap

The Philadelphia Phillies held on for a 2-1 victory over the Boston Red Sox at Fenway Park on May 12, 2026, scoring both of their runs in the first two innings and then leaning on their pitching staff to protect the lead through nine. The DiamondIQ model's estimate had Boston at a 48 percent chance of winning before first pitch, but that probability fell to zero by the final out, underscoring how thoroughly Philadelphia controlled the game despite being held to just five hits. Zack Wheeler was the central figure on the mound, generating a game-high 29.7 percent WPA among pitchers, while José Alvarado added 24.2 percent WPA in relief and Brayan Bello contributed 18.3 percent WPA for Boston in a losing effort.

The decisive sequence came in the final two innings, where the largest individual win-probability swings defined the outcome. In the bottom of the eighth, Mickey Gasper's strikeout against Alvarado cost Boston 16.5 percent in win probability, a pivotal moment that left the Red Sox with little margin entering the ninth. Boston mounted a brief threat in the bottom of the ninth off Jhoan Duran, as Trevor Story drew a walk that added 12.3 percent to the home side's chances, but Ceddanne Rafaela's strikeout immediately swung the needle 14.9 percent back toward Philadelphia. Marcelo Mayer then grounded out to end the inning, a play that, while routine in outcome, carried an 18.8 percent WPA swing as it extinguished Boston's last realistic opportunity. Rafaela's single off Wheeler in the seventh, worth 11.6 percent WPA, had represented the Red Sox's most encouraging offensive moment of the game.

Among individual performers, Mayer finished as Boston's top batter by WPA at plus 19.7 percent, a figure driven by his late plate appearances that kept the Red Sox within reach even as his minus 0.3 RE24 reflected limited run-expectancy contribution. Story also registered a positive 4.5 percent WPA alongside a minus 0.5 RE24, and Masataka Yoshida posted plus 3.8 percent WPA with a plus 0.1 RE24. The model leans toward crediting Philadelphia's bullpen construction as the structural advantage in a game where Boston generated seven hits but converted only one run across nine innings.