Ryan O’Hearn’s job, most days, is to sit on the bench and wait. The Orioles’ first baseman gets the occasional start against a right-handed starting pitcher. But usually his role is as a bench bat, a left-handed hitter at manager Brandon Hyde’s disposal to pinch hit against a right-handed reliever. The role isn’t new for O’Hearn, who spent the past few years in Kansas City as a bench bat for the Royals.