[RPatrino]

It most cases it does no harm to throw the pitcher a new ball while the catcher is running to the fence to retrieve an errant throw. For foul balls back to the fence, we let the on deck hitters get those. I have seen guys underhand balls to the pitcher if they can't throw them overhand. This is something I go over when I speak to the catcher/pitcher when they are warming up before the first pitch, so the pitcher knows to pay attention if his catcher is running down a ball.