The San Francisco Giants defeated the Kansas City Royals 5-2 at Scottsdale Stadium on March 20, 2026, a result the DiamondIQ model's estimate anticipated from the outset, with pre-game home win probability set at 86% that climbed to 100% by the final out. The game turned decisively in the bottom of the third inning, when Matt Chapman delivered a home run off Ryan Bergert that added 20.3% in win probability and served as the definitive momentum shift of the afternoon. Willy Adames compounded the damage in the same frame with a double that contributed an additional 12.0%, turning what had been a 2-0 Royals advantage from the first inning into a 4-2 Giants lead that the home side would never relinquish.
Kansas City did show early life, jumping ahead with two runs in the top of the first, and Jonathan India's strikeout to open that frame — against Adrian Houser — actually added 12.6% in win probability for the Royals by preventing a threat from developing on the Giants side. But two costly San Francisco outs in the early going, Patrick Bailey's groundout in the second that cost the Giants 16.5% in win probability and Luis Arraez's double-play grounder in the first that cost 15.1%, delayed rather than derailed a Giants offense that ultimately got what it needed from Chapman and the third-inning burst. San Francisco added a run in the eighth to push the final margin to 5-2.
On the strength of his home run and a RE24 of plus-2.0, Chapman was the game's most impactful offensive player, finishing with a WPA of plus-20.1%. Adames supported him at plus-9.1% WPA, while Jung Hoo Lee contributed plus-6.8% WPA and a RE24 of plus-0.6. On the pitching side, Carson Seymour led all arms with a WPA of plus-15.3%, with Matt Strahm and Carlos Estévez each adding modest contributions of plus-3.5% and plus-3.3%, respectively, as the Giants bullpen closed out the Royals on four hits.
Analysis generated by DiamondIQ's model.