Chicago Cubs at Seattle Mariners: Final Score & Recap
Line Score
| Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | R | H | E |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CHC | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 5 | 12 | 1 |
| SEA | 0 | 4 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 6 | 8 | 2 |
The Story
The Seattle Mariners walked off the Chicago Cubs 6-5 in ten innings on August 21, 2026, at T-Mobile Park, completing a comeback that saw the DiamondIQ model's estimate of a home win shift from 44 percent before the game to a certainty by the final out. Seattle jumped out to a 4-0 lead after two innings, with the Cubs scoring three in the first before the Mariners answered with four of their own in the bottom of the second. The game stayed there until the fifth, when Seattle added a run to push the lead to 5-3. Chicago refused to fold, with Alex Bregman delivering the most jarring swing of the night in the top of the ninth, a home run off Andrés Muñoz that added 35.7 percent to Chicago's win probability and knotted the game at five, setting up extra innings.
The decisive sequence unfolded in the bottom of the tenth against Ryan Zeferjahn. Victor Robles moved the automatic runner to third with a sacrifice bunt, swinging Seattle's win probability up 19.5 percent, before Julio Rodríguez grounded out to pull it back down 19.5 percent, leaving the Mariners one out from heading to an eleventh. Leo Rivas then ended it with a walk-off single that added 35.9 percent to Seattle's win probability and closed the book on the Cubs' rally.
On the individual side, Rivas led all position players with a WPA of plus-35.9 percent and an RE24 of plus-0.8, while Bregman's two-out heroics gave him a plus-26.8 percent WPA and a game-best plus-2.1 RE24 despite coming on the losing side. Cal Raleigh contributed a plus-21.1 percent WPA and plus-1.8 RE24 for the Mariners. On the mound, Emerson Hancock led Seattle's staff with a plus-14.0 percent WPA, followed by Gabe Speier at plus-10.1 percent. The Cubs finished with 12 hits to Seattle's eight but were undone by a Chicago error and an inability to protect the lead in the tenth, as the DiamondIQ model's estimate reflected zero remaining doubt once Rivas's bat connected.