Kansas City Royals at Boston Red Sox: Final Score & Recap

The Kansas City Royals completed a 3-2 road victory over the Boston Red Sox at Fenway Park on September 11, 2026, overcoming a pregame DiamondIQ model estimate of just 37 percent in their favor. Kansas City struck early, plating a run in the first inning and adding two more in the third to build a 3-0 lead against Seth Lugo. Boston answered in the fifth, when Wilyer Abreu's double off Lugo shifted the win probability by 14.3 percent and Mickey Gasper followed with a home run worth an additional 10.2 percent swing, pulling the Red Sox within 3-2. That fifth-inning burst represented Boston's only scoring of the night, as the Royals bullpen locked things down over the final four frames.

The game's most consequential sequence unfolded in the final two innings. Nate Pearson navigated a critical eighth, and while Trevor Story's double against him moved Boston's chances by 10.1 percent, Pearson ultimately stranded the threat, posting a WPA of plus-23.3 percent on the night, the single largest pitching contribution by that measure. Jovani Moran added plus-11.6 percent WPA in his own relief appearance. The game effectively ended in the ninth when Steven Cruz struck out Roman Anthony with Boston's win probability still alive, a sequence the DiamondIQ model registered as a 31.6 percent swing in Kansas City's favor, the largest single play of the contest.

On the offensive side, Roman Anthony finished as Boston's top performer by WPA at plus-16.8 percent despite that final strikeout, reflecting earlier at-bats in which he kept Red Sox chances alive. Gasper's home run gave him a WPA of plus-6.9 percent and a RE24 of plus-0.4, while Abreu's double contributed plus-5.3 percent WPA and a RE24 of plus-0.7. Seth Lugo absorbed the damage in the fifth but still finished with a WPA of plus-10.6 percent for Kansas City's ledger, a reflection of how Boston's model-favored position eroded steadily from the opening pitch to the final out.