Seattle Mariners vs Kansas City Royals Prediction, Odds and Picks for Today, 09/16/25

The Mariners enter this game riding a 9-game winning streak that has put them half a game up on the Astros in the AL West. The division crown is going down to the wire, and Seattle is looking to keep things rolling on Tuesday night against the Royals. However, during Seattle’s current winning streak, 7 of the 9 games have been at home. Now, the Mariners hit the road to face the Royals at Kauffman Stadium. So far this season, the M’s own a strong 48-27 record at home, but they well below the .500-mark at just 34-41 when playing on the road.

Furthermore, Logan Gilbert has some pretty staggering home/road splits. The veteran right-hander owns a solid 2.13 ERA at T-Mobile Park, but that number increases to 5.29 away from Seattle. In addition, his BAA goes from .152 at home to .271 on the road. Kansas City’s Michael Wacha has been steady this season, and given Gilbert’s road struggles, the Royals could be in a decent position to end Seattle’s winning streak. Make it a small play, but consider backing Kansas City on the money line.

Marines vs Royals prediction: Royals ML (+120) available at time of publishing. Playable at that number.

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