I have spoken to the teacher and the teacher in charge of kindy who spoke to my son and the other 2 boys yesterday.
My sons teacher was very open to keeping a note of any future incidences.
Thy understand my need to know exactly what is going on to deal with it at home.
There was only one incidence of actual hitting after another child pushed him. The other times he has been spoken to it was due to him and 2 other boys (always the same 2) that were wrestling. They don't know who starts this game but at this school they don't allow that kind of play, which is fine. They just spoke to them all about not playing rough games. The reason the teacher in charge of kindy spoke to them was because thy has been warned. This game has been happening during lunch. In class they do get silly but she is keeping an eye on it and separates them if needed.
So there you go. Not as bad as I thought. We will continue to talk about not playing rough games. I did learn that I rely onto much tv so that is changing.