Because if he does have an anxiety disorder, and football is all he knows? That could also be an issue for him, worrying what he would do without football. Anxiety makes people worry and always thinking about "what if". Again, I'm not a psychotherapist, but I'm willing to bet I know a lot more about how complicated an issue this is as I was married to one for 14 years. Mental disorders are one of the hardest things to control, even with meds. And maybe the meds he might need are banned by the NFL. And it's a matter of privacy as to why nothing has ever been mentioned...if there even is a problem. HIPPA ain't no joke no matter what your job is.