San Francisco Giants at Arizona Diamondbacks: Final Score & Recap

The Arizona Diamondbacks defeated the San Francisco Giants 8-4 on September 19, 2023, at Chase Field, with the DiamondIQ model's estimate of a home win beginning at 56% before the game and climbing to 100% by the final out. Arizona's offense established control early, scoring once in the first inning before a four-run second inning effectively decided the outcome. The Giants managed two runs in both the first and fifth innings but could not recover from the damage done against starter Alex Cobb in that pivotal second frame, finishing with six hits and two errors against Arizona's clean defensive performance.

The second inning proved to be the game's decisive sequence, driven by a pair of doubles off Alex Cobb that together shifted the win probability by more than 25 percentage points in Arizona's favor. Tommy Pham's double carried the single largest swing of the game at plus 13.6%, and Corbin Carroll followed with his own double adding another 11.8%. The Giants mounted their most meaningful threat in the top of the fifth, where Wilmer Flores drew a walk against Zac Gallen that moved the needle 10.6% toward San Francisco, and Thairo Estrada added another walk for a 5.3% swing, but Joc Pederson's strikeout in that same inning erased 8.3% of that momentum and Gallen held the damage to two runs.

By the numbers, Wilmer Flores led all batters with a WPA of plus 14.1% despite the loss, while Tommy Pham finished at plus 14.0% with an RE24 of 2.4 and Corbin Carroll contributed plus 13.2% with an RE24 of 2.1 to anchor Arizona's offensive performance. On the mound, Miguel Castro paced Arizona's relievers at plus 3.3% WPA, followed by Andrew Saalfrank at plus 2.9% and Kevin Ginkel at plus 1.9%, as the bullpen preserved the four-run cushion through the final innings. The DiamondIQ model leans toward Arizona's performance in this contest as having been shaped most critically by that four-run second inning and the bullpen's ability to maintain it.