Kansas City Royals at Toronto Blue Jays: Final Score & Recap

The Toronto Blue Jays defeated the Kansas City Royals 5-1 at Rogers Centre on September 9, 2023, a result the DiamondIQ model saw coming from the outset, with a pre-game home win probability of 77% that climbed to 100% by the final out. Toronto managed eight hits to Kansas City's two, and the Blue Jays controlled the game from the middle innings onward, keeping the Royals off the board until the fifth.

The pivotal sequence came in the fourth and fifth innings, where George Springer did the bulk of the damage against Zack Greinke. Springer opened the scoring with a solo home run in the bottom of the fourth, a swing that shifted win probability by 11.4 percentage points in Toronto's favor. The Royals briefly responded in the top of the fifth when Edward Olivares connected on a home run off Kevin Gausman, a hit worth 12.4 percentage points for Kansas City and the only moment the visitors meaningfully threatened. Toronto answered immediately in the bottom half, with Springer delivering a single off Greinke that added another 20.1 percentage points — the single largest win-probability swing of the game — and Daulton Varsho following with a double worth 11.3 points. Kevin Kiermaier's strikeout to end the inning prevented further damage, costing Toronto 9.0 percentage points, but the Blue Jays had already extended their lead decisively.

Springer finished as the game's most impactful player by a wide margin, accumulating a combined WPA of plus-35.4 with a RE24 of plus-3.4. Olivares was the lone bright spot for Kansas City with a WPA of plus-15.8. On the pitching side, James McArthur led all pitchers with a WPA of plus-18.1, while Gausman contributed plus-9.9 despite surrendering the Olivares homer. The DiamondIQ model leans toward Toronto's dominance being well-reflected in these numbers, as the Blue Jays never truly relinquished control after Springer's fourth-inning blast.