KANSAS CITY, Mo. (AP) — Rookie Nick Pratto hit a game-ending home run in the ninth inning, giving the Kansas City Royals a 5-4 win over the Boston Red Sox on Saturday night. Pratto blasted a two-out, 3-2 changeup from Garrett Whitlock (2-2) an estimated 424 feet to center field for his second career homer and first at Kauffman Stadium. “It was just like any other at-bat where I come up there with a plan and try to execute it,” Pratto said. “Throughout the at-bat he was making a lot of pitches to the edges so I felt like I was hanging in there and not chasing. It was a situation where I felt like I executed.” Whitlock, who had retired all eight batters he faced before Pratto, was less measured in his assessment of the walk-off homer.