Thank you all for sharing your thoughts and personal experiences. My son saw the athletic trainer this afternoon and failed the impact test. Based on the impact test and his reported symptoms, he was diagnosed with a concussion and told not to wrestle tomorrow. It is really sad that he can't compete in his last tournament as a senior, but it's nothing compared to how sad it would be to see him sustain further injury to his brain. My husband has him at the doctor's office right now. I made him go so he could hear first hand why it's not safe for our son to wrestle. (My husband is "old school" and thinks things should work the way they did back when he wrestled and head injuries were blown off as no big deal.) I had a concussion in high school from hitting my head on the diving board and it was a miserable time recovering. Thanks again for all the help!