Manager Davey Johnson said he thought about resting Harper against lefties, but it hasn't entered Harper's mind to sit on the bench against southpaws. He will play against Phillies left-hander Cliff Lee on Sunday.
Johnson said that opposing lefties are feeding Harper a steady diet of offspeed pitches outside the strike zone, and Harper keeps swinging at them.
"He gets impatient and he is his own worst enemy," Johnson said about Harper. "[Lefties] made adjustments challenging him with a little more offspeed stuff. His impatience is chasing stuff out of the zone. But that is part of maturing as a hitter. You have to make a adjustments in this level when they are attacking you. Sometimes, it's like an open book. You are too stubborn to read the book."