Washington Nationals at Boston Red Sox: Final Score & Recap

The Washington Nationals handed the Boston Red Sox an 8-1 defeat at Fenway Park on June 30, 2026, in a game that was never particularly close by the end. Boston entered with a 47 percent pre-game win probability according to the DiamondIQ model's estimate, but that figure collapsed to zero as Washington steadily pulled away. The Nationals plated a run in the fifth, then broke the game open with three in the seventh and four more in the eighth, finishing with 12 hits against a Red Sox staff that could not contain the damage.

The seventh inning was the decisive sequence. Luis García Jr. delivered a double off Justin Slaten that swung win probability by plus-24.0 percent, the single most impactful play of the game. Keibert Ruiz followed with a single off Slaten that added another plus-16.3 percent, effectively sealing the outcome before the Red Sox could mount any response. On the negative side for Washington, Andrés Chaparro grounded into a double play in the third, costing the Nationals 8.4 percent in win probability, and James Wood struck out in the seventh for a minus-8.0 percent swing, but those setbacks were ultimately absorbed by the broader offensive outburst.

The standout performers by the DiamondIQ model's accounting were led by García Jr., who finished with a plus-22.6 percent WPA and plus-1.7 RE24, and Ruiz, who posted plus-16.5 percent WPA and a team-best plus-2.6 RE24. On the mound, Cade Cavalli was the most valuable arm at plus-24.5 percent WPA, with Connelly Early contributing plus-19.9 percent in relief. Washington's final line of 8 runs on 12 hits against Boston's 1 run on 4 hits reflected a thorough, well-distributed effort that the Red Sox had no answer for.