The St. Louis Cardinals defeated the Washington Nationals 5-1 at Roger Dean Chevrolet Stadium on March 19, 2026, a result that carried the DiamondIQ model's estimate of home win probability from 53% before first pitch to 100% by game's end. St. Louis scored the game's first run in the bottom of the first before Washington answered with one of its own in the top of the second, but the Cardinals extended their advantage with a two-run third inning that effectively set the tone for the afternoon. A two-run eighth provided the final margin, leaving the Nationals without a meaningful response across the game's final frames.
The decisive sequence arrived in the bottom of the third, when Dakota Harris delivered a single off Eiker Huizi that registered as the game's most impactful plate appearance at plus-14.6% win probability added. Washington's best chance to shift momentum came in the top of the seventh, but it evaporated quickly: Joey Wiemer drew a walk off Chris Roycroft to push the DiamondIQ model's estimate slightly in the Nationals' direction at plus-6.0% WPA, only for James Wood to ground into a double play on the very next significant event, a swing that cost Washington 11.8 percentage points of win probability. Trey Paige added a home run off Cole Henry in the bottom of the eighth for plus-7.9% WPA, sealing any remaining doubt.
Among the standout performers, Harris and Nelson Velázquez each finished with plus-8.9% WPA on the offensive side, with Velázquez posting the superior run-environment contribution at plus-2.0 RE24 compared to Harris's plus-0.9. Paige contributed plus-7.9% WPA and plus-1.7 RE24. On the pitching side, Brad Lord led all pitchers at plus-12.8% WPA, supported by Quinn Mathews at plus-9.2% and George Soriano at plus-8.1%, a collective effort that kept Washington's seven-hit output entirely harmless beyond its lone run.
Analysis generated by DiamondIQ's model.