Pittsburgh Pirates at Arizona Diamondbacks: Final Score & Recap
Line Score
| Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | R | H | E |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PIT | 1 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 4 | 7 | 0 |
| AZ | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 | 1 |
The Story
The Pittsburgh Pirates defeated the Arizona Diamondbacks 4-2 at Chase Field on May 7, 2026, handing the home side a loss that the DiamondIQ model's estimate had deemed nearly even before first pitch, with Arizona carrying a 46 percent pre-game win probability that ultimately fell to zero. Pittsburgh scored in the first inning and again in the third before breaking the game open with a two-run fifth and an insurance run in the sixth, while Arizona managed only a pair of runs across nine innings against a Pirates pitching staff that held firm when it mattered most.
The decisive stretch of the game ran through the fifth and sixth innings, where Pittsburgh seized control against Zac Gallen. Spencer Horwitz delivered a single in the top of the fifth that swung win probability 15.6 percentage points in Pittsburgh's favor, and Joey Bart followed in the sixth with a home run off Gallen that added another 13.5 points, essentially closing out Arizona's realistic path to a comeback. Arizona had briefly shown life in the third when Corbin Carroll hit a home run off Mitch Keller to swing 11.1 points toward the Diamondbacks, but that momentum proved short-lived. The killing blow for Arizona came in the seventh when Jose Fernandez grounded into a double play off Dennis Santana, a sequence that cost the home side 14.0 points of win probability and extinguished a potential rally. Jorge Barrosa's strikeout to end the ninth added another 14.4 points to Pittsburgh's ledger, sealing the final.
Among the standout performers by the DiamondIQ model's accounting, Horwitz finished as the top batter with a combined WPA of plus-16.2 and an RE24 of plus-1.0, while Bart contributed plus-12.7 WPA and plus-0.9 RE24 to anchor the Pittsburgh offense. On the pitching side, Dennis Santana led all pitchers with plus-15.8 WPA, benefiting enormously from the double-play inning, with Isaac Mattson adding plus-8.8 and Mitch Keller contributing plus-6.4 despite surrendering the Carroll home run. Pittsburgh's error-free defense, matched against Arizona's one miscue, reflected the clean execution that defined the visitors' performance throughout the night.