The San Diego Padres walked off with a 7-6 victory over the Seattle Mariners on April 15, 2026, at Petco Park in one of the more dramatic reversals of the season. Seattle carried a 6-2 lead into the bottom of the ninth and appeared firmly in control, with the DiamondIQ model's estimate of a San Diego win having climbed only modestly from its pre-game figure of 54 percent. That all changed in a matter of minutes, as the Padres pushed five runs across against Seattle's late-inning relievers to complete the comeback. The line score told the full story of Seattle's early dominance and late collapse, with the Mariners plating two runs each in the second, fourth, and fifth innings before the bullpen unraveled entirely.
The decisive moment of the game arrived when Jackson Merrill stepped to the plate against José A. Ferrer in the bottom of the ninth with the Padres trailing. Merrill's double shifted the DiamondIQ model's estimate by a staggering 84.7 percent in San Diego's favor, the single most impactful play of the night by a wide margin, and it reflected just how thoroughly the at-bat flipped the game's trajectory. Andrés Muñoz then entered and could not hold the line, as Gavin Sheets added a double worth 7.6 percent in win probability and Ramón Laureano followed with a single that added another 13.4 percent to seal the outcome. Merrill finished as the game's top performer by WPA at plus 81.9 percent with a RE24 of plus 1.5, while Laureano contributed plus 12.3 percent WPA and plus 0.9 RE24.
Before the ninth-inning chaos, Seattle had constructed its lead on the strength of timely hitting and a strong pitching performance. Brendan Donovan's single in the top of the fourth off Randy Vásquez contributed a plus 12.6 percent swing in win probability for the Mariners and ranked as the third most impactful play of the game, while Dominic Canzone's double off Vásquez in the second added another 7.8 percent. On the mound, Emerson Hancock was San Diego's top contributor by WPA at plus 19.7 percent, keeping the deficit from growing further during his time in the game. Despite Seattle finishing with a perfect 0 errors and matching San Diego's 10 hits, the Mariners could not protect what had looked like a comfortable advantage, and the DiamondIQ model settled at 100 percent in San Diego's favor when Laureano's single found the outfield grass.
Analysis generated by DiamondIQ's model.