Part of his pro wrestling persona is to say how he won with a "broken freaking neck". He goes on and on about it. Fact of the matter is, he had a small vertebral fracture in his cervical spine that was discovered a few months before the Olympics. Normal X-rays had missed it due to its small size. It was a fracture, but it is commonly misdiagnosed as a sprained neck. Not taking away from what was certainly a very painful injury, but it was not nearly as severe as his pro wrestling persona would have you believe. The Olympic team physicians would never have allowed him to compete if it was truly a dangerous fracture.
His neck has been a huge problem ever since then. Read about some of his surgeries and pain killer needs
here. He was basically let go from the WWE for failing their Wellness program due to his continuing reliance of pain killers and possibly steroids. Dissappointingly, he has recently been linked to the massive steroid/HGH probe in Albany NY with alot of other pro athletes.
He has also had a cracked rib in pro wrestling as well as a few concussions.