By rule if we suspect that a kid is hurt or unable to perform we are to stop the game and get the kid out or have a coach attend to him. If we feel that a kid has been knocked out due to a hit to the helmet we are required to have a doctors signed statement releasing the kid to come back into the game. I always error on the side of caution. If a kid takes a nasty shot to the helmet I always check him. If I feel that he is the least bit incoherent then I get him out of the game. I had a kid at the Cove get hit and it knocked him out. I informed the coach that if he were to return I have to have a signed statement from a doctor. An MD not a dentist or other doctor.