So umpire at last nights game answered the question for this post -
Pitched another game, still had an audible grunt, other team picked up on it, started doing it when he was going into his windup. Umpire stopped game, told both sides that it was a violation of the KSHSAA rules, in that it was targeting a certain player, and it needed to stop, and that was the end of it. I really dont even think they were doing it to be mean, its just a matter of it is something different. Does he really need to grunt when he is pitching? I dont know, but he was smiling and having fun, so its all good.