KANSAS CITY— Omar Infante and Cheslor Cuthbert each came through with two-out, two-run hits in the first inning and Yordano Ventura delivered seven strong innings to lift the Royals to a 5-1 win over the Astros on Sunday at Kauffman Stadium.The Royals (59-38) took two of three in the weekend series while scoring all five runs in the opening two innings against American League All-Star starter Dallas Keuchel, who came in with an AL-best 2.12 ERA. The five runs allowed equaled the highest total Keuchel has surrendered this season.“It’s about as good a weekend as it can get,” Royals manager Ned Yost said. “We got the walk-off win Saturday, the win today, the Johnny Cueto deal today. It doesn’t get much better than that.”The Astros (55-45) received an RBI single from Colby Rasmus in the second, but could do nothing more against Ventura, who had been optioned to Triple-A Omaha earlier in the week, only to be immediately brought back because of an elbow injury sustained by Jason Vargas.Ventura (5-7) got through seven innings with 97 pitches and won for the first time since July 9.