Seattle Mariners at Boston Red Sox: Final Score & Recap
Line Score
| Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | R | H | E |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SEA | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 8 | 12 | 0 |
| BOS | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 3 | 12 | 1 |
The Story
The Seattle Mariners handed the Boston Red Sox an 8-3 defeat at Fenway Park on September 2, 2026, a result that was largely determined by two multi-run innings and a pitching performance that held firm through Boston's most dangerous moments. The DiamondIQ model had entered the game giving Boston a 60% win probability, but that estimate collapsed to 0% by the final out as Seattle's offense did its damage in concentrated bursts in the third and sixth innings.
The decisive sequence came in the top of the third, when Seattle erupted for four runs against Patrick Sandoval. Josh Naylor's single was the most impactful swing of the entire game, shifting win probability by plus-14.9 points in Seattle's favor, and Julio Rodríguez followed with a single of his own that added another 9.1 points. Those two plays alone rewrote the competitive context of the afternoon. Boston mounted its most credible threat in the fourth inning, when Trevor Story laced a double off Bryce Miller that swung win probability by plus-6.9 points, and Wilyer Abreu added a double of his own for another plus-5.3 points, pulling Boston to within 4-1. However, Nick Sogard's groundout against José A. Ferrer in the fifth, costing Boston 7.0 points of win probability, ended the rally before it could gain traction. Seattle then pulled away with four more runs in the sixth to extend the margin to 8-1 and effectively end the contest.
Rodríguez finished as Seattle's top batter by WPA at plus-12.5, while Naylor contributed plus-11.6 and Jhonny Pereda posted the game's most productive RE24 mark among position players at plus-2.5, reflecting his run-creation efficiency. On the pitching side, Bryce Miller led all pitchers with a plus-14.2 WPA, absorbing Boston's fourth-inning push without surrendering the lead, and Ferrer added plus-2.5 in relief. Seattle finished with 12 hits and committed no errors, while Boston's lone error contributed to a 12-hit afternoon that ultimately went to waste against a Mariners club that converted its opportunities with precision.