KANSAS CITY, Mo. (AP) -

 Jason Vargas tossed a three-hitter for his sixth career shutout, Omar Infante hit a two-run homer and the Kansas City Royals beat the Oakland Athletics 3-0 on Wednesday night.
    
Vargas (9-5) retired the final 23 batters he faced in only his third start since an emergency appendectomy. The left-hander also helped Kansas City bounce back from having an eight-game winning streak snapped and maintain a half-game lead over Detroit in the AL Central.
    
Salvador Perez drove in the Royals' other run off Scott Kazmir (13-5), who lost to Kansas City for the second time in 10 days. He has won just once in 10 starts at Kauffman Stadium.