The stage is now set. Luis Castillo made sure of it. The Mariners’ righty spun six scoreless frames to lead a 2-0 series-clinching victory over the Royals on Thursday afternoon at Kauffman Stadium.

Luis Castillo pitched six shutout innings and the bullpen did the rest of the work, as the Mariners take two out of three from the Kansas City Royals

He said the roster now has “no question in my mind” the potential to reach the postseason and contend for a World Series.

Seattle Mariners starter Luis Castillo (8-8) allowed five runs and six hits in four innings as the Tampa Bay Rays won 10-2 for their fourth straight win.

Luis Castillo pitched six innings of three-hit ball, Jorge Polanco and J.P. Crawford drove in runs, and the Seattle Mariners beat the Kansas City Royals 2-0 on Thursday to climb back into a first-place tie with the Houston Astros in the AL West.

Castillo allowed one run on three hits and two walks while striking out five over six-plus innings in a no-decision Friday versus the Angels.

MLB player prop bets and odds for Maikel Garcia on Thursday, September 18, 2025, as the Kansas City Royals take on the Seattle Mariners.

Expert recap and game analysis of the Seattle Mariners vs. Houston Astros MLB game from September 19, 2025 on ESPN.