KANSAS CITY— Jarrod Dyson lined a two-run single to right with one out in the eighth inning and the bullpen hung tough over seven-plus innings as the Royals held on for a 3-1 win over the Pirates on Tuesday night in front of 38,163 fans at Kauffman Stadium.The winning rally got going when Omar Infante hit a ground ball that went right through the legs of Pirates second baseman Neil Walker for an error. Alex Rios singled to left-center with Rios taking second on the throw, setting up Dyson’s heroics.“It didn’t do anything,” Walker said of Infante’s grounder, discounting any unexpected movement of the ball. “It just went right under my glove.