If he can’t hit lefties then he literally has no utility on the team. You can’t justify pinch hitting him over a lefty hitter against right handed pitching, the only guys you’d feel more comfortable against RHP are Straw and Heineman, maybe Ernie, and he can’t cover their positions. He’s not an MLB player if he’s a RHH with little defensive utility, a mediocre baserunner and also can’t be trusted in a platoon role.