Minute Maid Park lived up to its reputation Sunday afternoon as the Kansas City Royals and Houston Astros took aim at the hitter-friendly confines in an old-fashioned American League slugfest. The Royals relied heavily on the long ball. KC hit four home runs to power past the playoffhopeful Astros 6-5 in thrilling fashion. Royals outfielder Nelson Velázquez fueled the offensive effort. He hit…