Mr. .418 OBP Edgar Martinez Named New Hitting Coach for the Mariners

Will it make a difference for the next 30–33 games?

Probably not cuz he can't give them his 20/10 vision 

@diondimucci

True, though I'm curious if patience, pitch selection, and eye at the plate can be taught to a bunch of wild-swinging baseball players. Perhaps to the point that they can improve a bit. Though I always thought you either have that during your early stages of development or you don't.