KANSAS CITY— Omar Infante’s slow infield squibber plated Alex Rios with the go-ahead run in the eighth inning and right-hander Ryan Madson closed out the ninth as the Royals held off the White Sox, 5-4, on Sunday to sweep the three-game series.With runners on second and third and one out, Infante hit a jam shot toward first baseman Jose Abreu, whose throw home was late to get Rios.Madson filled in for Greg Holland, who had pitched the previous two nights, to record his second save of the season. Madson had 32 saves in 2011.Danny Duffy started for the Royals but shaky command led manager Ned Yost to pull him after 3 1/3 innings with the score tied, 3-3. Kris Medlen entered and was phenomenal, allowing no hits and no runs through 3 2/3 innings.