[BUFFLURP]

there isn't one.

I played some big time baseball as a pitcher, and if you want power at the plate, just get some big legs and a strong core. you will crush the ball. slow pitch ball has no specific excercises that i have ever heard of.

do all the basic bench and squat stuff, just like anyone else.

now, if this was fast pitch, there are rotator cuff specific excercises, but you don't need to worry about that in slow pitch.