Mike Moustakas was a bit daunted when he came to the plate in the eighth inning with the bases loaded and his team down by one. The numbers were looming right there on the scoreboard: 0 for 18 and a batting average under .180 Then the 24-year-old heard his Kansas City Royals teammates shouting words of encouragement, and he calmed down and smacked an RBI single to right field to tie the game. George Kottaras followed with a bases-loaded walk to drive in the go-ahead run in a four-run eighth inning, and the Royals rallied for a 7-3 win over the Houston Astros on Tuesday night to end a four-game skid.