Arizona Diamondbacks at Boston Red Sox: Final Score & Recap
Line Score
| Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | R | H | E |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AZ | 0 | 0 | 0 | 0 | 3 | 2 | 0 | 0 | 0 | 2 | 7 | 10 | 0 |
| BOS | 1 | 0 | 1 | 0 | 0 | 3 | 0 | 0 | 0 | 1 | 6 | 9 | 0 |
The Story
The Arizona Diamondbacks rallied past the Boston Red Sox 7-6 in ten innings at Fenway Park on August 19, 2026, completing a comeback that erased what the DiamondIQ model had pegged as a 55 percent pre-game home win probability for Boston. Arizona trailed through much of the contest before plating three runs in the top of the fifth, when Gabriel Moreno's double off Payton Tolle was the turning point, carrying a win-probability swing of plus-23.7 percent. Boston answered in the bottom of the sixth with a Mickey Gasper home run off Brandon Pfaadt, the single biggest momentum shift of the night at plus-36.2 percent, briefly pushing the Red Sox back in front and into a dominant position. Lars Nootbaar countered in the top of the sixth with a home run off Greg Weissert worth plus-18.3 percent, setting the stage for an extra-inning finish with the score knotted at six.
Arizona seized control in the tenth on Geraldo Perdomo's sacrifice bunt off Jovani Morán, a plus-16.4 percent swing that advanced the go-ahead run into scoring position, and the Diamondbacks ultimately pushed across two runs to take a 7-6 lead. Boston's best chance to answer ended when Caleb Durbin popped out against Jonathan Loáisiga, a play that swung win probability plus-31.6 percent in Arizona's favor and sealed the outcome. On the pitching side, Aroldis Chapman led Arizona's relief corps with a plus-13.5 percent WPA contribution, followed by Kevin Ginkel at plus-11.3 percent and Tyron Guerrero at plus-10.6 percent.
Despite posting the game's largest individual WPA play, Mickey Gasper finished as Boston's top batter at plus-33.5 percent WPA and plus-2.4 RE24, underscoring how much of Boston's win probability ran through his sixth-inning blast. Arizona's top performers by WPA were Ryan Waldschmidt at plus-22.6 percent and Jose Fernandez at plus-20.6 percent, the latter also contributing plus-1.8 RE24 in run-creation value. The DiamondIQ model's estimate of Boston's win probability fell from 55 percent before first pitch to zero at the final out, a complete reversal driven by Arizona's late-game execution on both sides of the ball.