Pittsburgh Pirates at Houston Astros: Final Score & Recap

The Pittsburgh Pirates handed the Houston Astros a 5-1 defeat at Daikin Park on June 4, 2026, in a game that was largely decided by a four-run sixth inning that turned a tight contest into a comfortable Pirates victory. The DiamondIQ model had entered the day giving Houston a 44 percent chance of winning at home, but by the final out that figure had fallen to zero, reflecting just how thoroughly Pittsburgh seized control of the evening.

The decisive sequence unfolded in the top of the sixth against Astros starter Kai-Wei Teng, who had kept Pittsburgh in check through five innings. Ryan O'Hearn delivered the decisive blow, a home run that shifted win probability by plus 13.5 percent and represented the single most impactful offensive play of the night. O'Hearn finished as Pittsburgh's top batter by WPA at plus 11.9 percent with a RE24 of plus 2.1. The damage had been set up in part by Jake Mangum, whose fifth-inning double generated a plus 8.6 percent win-probability swing and carried him to a final WPA of plus 6.7 percent. Bryan Reynolds added a single in the sixth worth plus 7.8 percent, and Brandon Lowe's double contributed another plus 7.1 percent swing, piling further pressure onto Teng. Oneil Cruz also finished among the top contributors at plus 6.7 percent WPA and plus 1.1 RE24.

The Pirates' pitching staff was equally dominant, with Jared Jones leading all pitchers in the game at plus 25.5 percent WPA, anchoring a staff that held the Astros to a single run on eight hits. Carmen Mlodzinski added plus 2.7 percent and Bryan Abreu contributed plus 0.3 percent in relief. Pittsburgh finished with nine hits and no errors, while Houston committed one error in what was a clean and efficient performance by the visitors from start to finish.