Stephen Kolek pitches a CGSO, Royals beat Mariners 5-0

KANSAS CITY, MISSOURI - MAY 23: Starting pitcher Stephen Kolek #32 of the Kansas City Royals pitches during the 1st inning of the game against the Seattle Mariners at Kauffman Stadium on May 23, 2026 in Kansas City, Missouri. (Photo by Jamie Squire/Getty Images) | Getty Images In today’s game thread, I wrote that Stephen Kolek’s second-best career start probably came against the Mariners last September, and we might need him to do even better if they were going to win today. As it turned out,