Pittsburgh Pirates at Chicago White Sox: Final Score & Recap

The Pittsburgh Pirates handed the Chicago White Sox a 4-2 defeat at Rate Field on September 9, 2026, completing a comeback that erased what the DiamondIQ model had estimated as a 56 percent pre-game home win probability for Chicago. Pittsburgh was held scoreless through four innings before plating a run in the fifth, then broke the game open with three runs in the seventh. Chicago managed single runs in the seventh and eighth but could not close the gap, as Pittsburgh's bullpen held firm through the final frames.

The decisive swing came in the bottom of the eighth, when Chase Meidroth grounded into a double play off Luke Weaver, a sequence that shifted win probability by negative 35.4 percent against the White Sox and effectively sealed the outcome. Earlier, in the bottom of the seventh, Miguel Vargas had grounded into another double play off Yohan Ramírez, costing Chicago 18.8 percent in win probability at a moment when a rally might have changed the game's complexion. On the Pittsburgh side, Braden Montgomery's double in the eighth off Weaver added 17.2 percent to the Pirates' win probability, and Rafael Flores Jr.'s single in the top of the seventh off Sean Newcomb contributed 14.1 percent, helping construct the three-run frame that proved to be the difference.

Among individual performers, Braden Montgomery led all batters with a WPA of plus 22.0 percent and a RE24 of plus 1.4, while Esmerlyn Valdez posted plus 12.7 percent WPA and Munetaka Murakami added plus 12.1 percent. On the mound, Yohan Ramírez led Pittsburgh's relievers with plus 18.8 percent WPA, followed by Brandon Eisert at plus 15.2 percent and Gregory Soto at plus 7.9 percent, a trio that collectively neutralized Chicago's late-inning attempts to extend the contest.