KANSAS CITY: Luis Castillo, fresh off signing a rich contract with Seattle, got chased as the Kansas City Royals erupted for 11 runs in the sixth inning and a wild, 13-12 win Sunday (Monday in Manila) that cost the Mariners a chance to move up in the AL wildcard standings.

Mitch Haniger singled twice during an eight-run fifth for the Mariners, and they led 11-2 going into the bottom of the sixth. But Castillo struggled, and Michael Massey homered and drove in four runs during the Royals’ biggest inning since 2004.

The Mariners stayed in the third wild-card spot, a half-game behind Tampa Bay. Seattle remained four games ahead of Baltimore for that last AL playoff slot.

Holding a nine-run lead, Castillo struck out the first batter in the Royals sixth. After a walk and Massey’s homer, Castillo was pulled after another walk. The Royals wound up combining seven hits, including a two-run single by Massey, and five walks off four pitchers to take the lead. Matt Brash (3-5) faced four batters and failed to record an out.

Hunter Dozier finished with three hits and two RBIs for the Royals.

Jose Cuas (4-2) recorded four outs for the win. Scott Barlow earned his 24th save.