The Athletics handed the Seattle Mariners a 5-2 defeat at T-Mobile Park on April 21, 2026, taking control of a game the DiamondIQ model had entering with only a 40 percent chance of winning for the home side. Oakland spread its offense across seven innings, collecting 13 hits without committing an error, while Seattle's bats managed only 8 hits and never seriously threatened to erase the deficit. The DiamondIQ model's estimate of a Seattle win fell to zero percent by the final out.
The decisive sequence of plays came in the middle innings, where three home runs shifted the game's complexion swing by swing. Jeff McNeil opened the scoring in the top of the fourth with a solo home run off Luis Castillo, a play that added 11.8 percent in win probability for Oakland. Seattle responded in the fifth when Cal Raleigh connected off Jacob Lopez for a home run worth 13.4 percent in win probability, briefly tightening the contest. The Athletics answered emphatically in the seventh, however, when Shea Langeliers drove a home run off Gabe Speier for the single largest win-probability swing of the night at plus-15.3 percent, effectively icing the game. Tyler Soderstrom's double off Eduard Bazardo in the sixth had also added 8.3 percent to Oakland's chances, and Leo Rivas's pop out in the bottom of the fourth stood as the night's most damaging negative play for Seattle at minus-6.5 percent.
Among individual performers, Cal Raleigh led all batters with a plus-18.0 WPA and plus-1.2 RE24, providing Seattle's brightest moment in an otherwise difficult evening. Langeliers was close behind at plus-17.2 WPA and plus-1.1 RE24, while McNeil contributed plus-8.5 WPA. On the mound, Jack Perkins paced Oakland's pitching staff with plus-10.2 WPA, followed by Luis Castillo at plus-9.0 despite surrendering McNeil's home run, and Scott Barlow added plus-7.6 WPA in relief. The Athletics controlled the game cleanly from start to finish, and the DiamondIQ model's estimate reflected a complete victory with no path remaining for the Mariners.
Analysis generated by DiamondIQ's model.