Arizona Diamondbacks at Houston Astros: Final Score & Recap

Arizona held on to defeat Houston 3-2 at Daikin Park on September 6, 2026, handing the Astros a loss the DiamondIQ model's estimate had pegged as a 52 percent home-win probability before first pitch, a figure that dissolved entirely by the final out. The Diamondbacks built their margin early, with Nolan Arenado delivering the game's most consequential offensive blow in the top of the third, a home run off Peter Lambert that swung win probability 21.3 percent in Arizona's favor and accounted for the largest positive batting swing until the game's final moments. The Astros pulled within one in the bottom of the eighth on a LaMonte Wade Jr. single off Jonathan Loáisiga, which nudged Houston's chances up 10.0 percent, and a subsequent Christian Walker single added another 9.6 percent, making it a one-run game heading to the ninth. However, Taylor Trammell's flyout in that same frame cost Houston 18.7 percent in win probability and proved to be the inning's crushing missed opportunity.

Kevin Ginkel closed it out in the ninth, getting Yordan Alvarez to strike out to end the game, a sequence that registered as the single largest win-probability swing of the night at 31.6 percent. Alvarez finished as Arizona's top batter by WPA at plus-22.1 percent despite his team ultimately falling short, reflecting how heavily the model weighed his plate appearances throughout the night. Arenado followed at plus-15.6 percent with a RE24 of plus-1.1, and Jose Altuve contributed plus-13.8 percent WPA for Houston. On the mound, Eduardo Rodriguez was the evening's dominant pitching figure by WPA at plus-26.2 percent, while Brandyn Garcia added plus-8.0 percent and Loáisiga plus-4.5 percent despite absorbing pressure in the eighth. The DiamondIQ model leans toward Arizona's bullpen management as the deciding factor, with the Diamondbacks successfully stranding Houston's late threats across nine clean innings defensively.