OAKLAND, Calif. — Kansas City Royals first baseman/outfielder Ryan O’Hearn sat most of the day, then stepped into the box for one at-bat in a potentially game-changing situation. O’Hearn delivered the biggest hit of the game and drove in the run that propelled his club to its third straight win. O’Hearn smacked a pinch-hit RBI double in the seventh inning of a 2-0 win over the Oakland Athletics in the second game of a three-game series in front of an announced 10,936 at the Oakland Coliseum on Saturday afternoon. The Royals (23-41) have now won three consecutive road games for the first time t…