Chicago Cubs at Pittsburgh Pirates: Final Score & Recap

The Chicago Cubs shut out the Pittsburgh Pirates 4-0 at PNC Park on June 20, 2023, completing a wire-to-wire victory that left the DiamondIQ model's estimate of a Pittsburgh win falling from 53% before first pitch to 0% by the final out. The Cubs manufactured their runs in two separate bursts, scoring once in the third, once in the fourth, and twice more in the eighth, while holding the Pirates scoreless across all nine innings on just five hits.

The decisive blow came in the top of the third when Tucker Barnhart hit a home run off Johan Oviedo, a swing that shifted win probability by 10.7 percentage points in Chicago's favor and stood as the single most impactful play of the game. Oviedo was touched again in the fourth, when Ian Happ laced a triple that moved the needle another 7.5 points toward the Cubs. Pittsburgh's best chance at a rally materialized in the bottom of the seventh, when Tucupita Marcano doubled off Marcus Stroman to claw back 7.1 points of win probability, but that momentum dissolved immediately as Cal Mitchell struck out in the same inning, a swing-and-miss that cost the Pirates 8.0 percentage points. Mike Tauchman put the game away with a two-run home run off Dauri Moreta in the eighth, adding another 9.4-point swing.

Marcus Stroman was the clear statistical engine of the Cubs' performance, finishing with a remarkable plus-40.7% WPA as the game's top pitcher by that measure. On the offensive side, Barnhart led all batters at plus-8.2% WPA with a RE24 of plus-0.7, while Happ contributed plus-6.7% WPA and plus-0.6 RE24. Pittsburgh's Marcano posted plus-7.1% WPA despite the loss, a reflection of how his double represented the Pirates' only genuine threat to alter the outcome.