KANSAS CITY, Mo. (AP) — 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.

The Mariners are headed to Houston for a three-game series beginning Friday night.

Eduard Bazardo and Gabe Speier tossed an inning apiece for Seattle. Andres Muñoz stranded two in the ninth by striking out Adam Frazier on three pitches for his 36th save.

Castillo (10-8) dueled with Kansas City counterpart Stephen Kolek, who allowed two runs — one earned — while pitching into the eighth inning. One run came on Polanco’s double and the other after an astute move by manager Dan Wilson in the eighth.

Kolek appeared to have r

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