Seattle Mariners vs Kansas City Royals Prediction & Picks - MLB

Prediction published on 9/18/25, 10:30 AM  by Lou Aguila in MLB Picks

After busting Seattle’s 10-game win streak on Wednesday, the Kansas City Royals will try to clinch the series in Thursday’s Game 3 at Kaufmann Stadium.

The Royals are home underdogs at +105 ($105 profit per a $100 bet) to -125 favorites Mariners ($100 profit per $125 bet), who will start right-handed pitcher Luis Castillo.

Current Form:

The Royals snapped the Mariners’ 10-match win streak after gutting out a 7-5 win on Wednesday. Catcher Salvador Perez gave Seattle an early 3-0 lead with a three-run blast in the first inning. The Mariners fought back and took the lead after JP Crawford belted a one-run blast at the top of the 8th inning. The Royals refused to go down without a fight. Ignited by Adam Frazier’s two-run homer, the Royals scored four runs in the 8th inning to retake the lead at 7-4. Kansas City closer Carlos Estevez forced Dominic Canzone into a double play to earn the final outs of the game, preserving the win for the Royals. The win pushed the Royals back to .500 with a 76-76 record.

The Mariners (83-69) will try to regain their winning form after failing to extend their winning streak beyond 10 games. The loss opened the door for the Astros (84-69) to retake the AL West leadership after sweeping the Texas Rangers this week.