KANSAS CITY, Mo. — The Yankees feasted on home runs in the friendly confines of Yankee Stadium over the last week. Friday, they packed up that power up and brought it on the road. Anthony Rizzo hit his major league-leading ninth home run of the season as the Yankees hit four homers total as they routed the Royals, 12-2, at Kauffman Stadium in a rain-shortened, eight-inning game. It was the season-high seventh straight win for the Yankees (14-6), who jumped into the lead in the majors with 29 homers. Rizzo hit his ninth of the season in the first inning. The two-run shot to left-center tied the…