Seattle Mariners at Kansas City Royals: Final Score & Recap
Line Score
| Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | R | H | E |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SEA | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 1 |
| KC | 3 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | - | 5 | 9 | 0 |
The Story
The Kansas City Royals handled the Seattle Mariners 5-0 on May 23, 2026, at Kauffman Stadium, turning what the DiamondIQ model opened as a near coin-flip — 47 percent home win probability — into a complete-game rout that ended at 100 percent certainty for the home side. Kansas City did its most decisive damage early, plating three runs in the first inning and adding single tallies in the third and sixth to build a lead Seattle never threatened. The Mariners finished with four hits and committed one error, while the Royals collected nine hits against a Seattle staff that could not hold the game close.
The single most damaging play of the night came in the top of the second, when Dominic Canzone hit into a double play off Stephen Kolek, a sequence the DiamondIQ model registered as a 12.5 percent swing against Seattle's win probability. That moment effectively extinguished any early hope the Mariners carried into the frame. On the Kansas City side, Maikel Garcia's groundout in the bottom of the second added 7.5 percent to the Royals' win probability, continuing the quiet accumulation of damage that buried Seattle. Isaac Collins contributed a strikeout drawn off George Kirby in the first inning worth 7.2 percent in KC's favor, capping an opening frame that proved to be the game's turning point.
Stephen Kolek was the night's dominant individual performer, credited with a 28.9 percent win-probability contribution that towered over every other player on either roster. Among position players, Collins finished with a plus-9.1 percent WPA and a 0.7 RE24, while Garcia posted plus-8.5 percent WPA. Luke Raley provided Seattle's brightest moment with a fifth-inning single off Kolek worth 3.3 percent, finishing with a 6.0 percent WPA and team-best 1.3 RE24, though those numbers reflected value within a losing effort. The DiamondIQ model leans toward performances like Kolek's as the clearest explanation for a final margin that was never as close as the pregame odds suggested.