Seeing how you set this up, I am willing to bet that the player that you mentioned went on to be very successful in baseball. As we all know, there are exceptions to every rule. There are also individuals who misuse authority.
In the case of the player that is being discussed in this thread, the only problem that we heard was the coach wanted the player to adhere tot an appearance code of conduct. For those new to high school or college baseball, this is not unusual. As I mentioned, my son normally has a beard. His college coach does not allow facial hair on the team. So, for the sake of respect to his coach and his teammates, he honors that request, as does everyone else. He also has a great relationship with his coach. He is not going to let one little inconvenience disrupt that relationship. So, in OO's Dads case, throw the coach a bone, get on the field, and play some baseball.