Arizona Diamondbacks at Seattle Mariners: Final Score & Recap

The Seattle Mariners walked off the Arizona Diamondbacks 3-2 in ten innings on May 31, 2026, at T-Mobile Park, a game the DiamondIQ model entered with a 52 percent home win probability that closed at 100 percent by the final out. Seattle managed eleven hits to Arizona's three, and the Mariners' lone error matched one by the Diamondbacks, but the offensive imbalance told much of the story in a low-scoring affair that required extra innings to resolve.

The decisive sequence unfolded across the final two innings. In the top of the tenth, Tim Tawa's sacrifice bunt off Luis Castillo moved the automatic runner and shifted the win probability 18.3 percent in Arizona's favor, and Jose Fernandez followed with another sacrifice bunt that added 16.4 percent, positioning the Diamondbacks with a lead opportunity. However, Adrian Del Castillo's strikeout to end the threat against Luis Castillo swung the probabilities back 18.7 percent, effectively neutralizing Arizona's best late chance. In the bottom of the ninth, Randy Arozarena's strikeout against Juan Morillo had preserved Arizona's chances with a 14.0 percent swing, but Victor Robles settled matters in the tenth with a walk-off single off Jonathan Loáisiga that carried a 15.4 percent win probability impact and ended the game.

On the pitching side, Bryce Miller led all players with a 21.4 percent WPA contribution, anchoring Seattle's effort across his innings and keeping Arizona's thin offense in check. Juan Morillo added 7.0 percent and Kevin Ginkel contributed 5.5 percent in relief. Offensively, Dominic Canzone paced the Mariners with a game-high 20.3 percent WPA and a RE24 of plus-1.4, while Robles and Tawa rounded out the top performers with 15.4 and 12.3 percent WPA figures respectively. The DiamondIQ model favors Seattle's pitching infrastructure as the primary driver of the outcome.