The only one who said anything was my son, and he showed the bite to the ref. The other two occurances he let slide...until he was done for the day, then showed me the bite marks. He said he doesn't think it does any good to tell the ref. Personally, I think letting it slide encourages it to escalate. We saw a match in Augusta where the losing kid pinched the kid pinning him in the crotch. I mean, pinched and held, the poor boy was crying, but held held on til he won. The ref did talk to the kid and coach on that one.