I was watching an older team play after finishing our game. The head coach was sitting on a bucket next to the on deck circle. His team was on the field. Every time his pitcher pitched what looked to be a good pitch from his angle, he would yell "Great Pitch" right before it crossed the plate. Now I realize that this could possibly help the batter but It looked more like it was distracting. It really got on my nerves and I felt it was out of line coming from a coach. Is there any written or un-written rules about coaches yelling stuff just before a ball reaches the batter?