I simply can't fathom why the guy wouldn't get even a sniff from an NFL team unless:
1. He simply isn't very good. But I find it hard to believe that every NFL FO thinks the kid has zero shot at making their roster. Still it is a possibility. Maybe they simply don't think he is good ENOUGH to counter the bad press they are likely to get if they sign him. After all, he is a convicted sex offender (as ridiculous as that label is in this situation).
2. There is more to the story, or there are more stories that have kept every NFL team away. It could be he comes across poorly, has been given poor recommendations by his previous coaches/teammates, etc. But judging by what I have read and heard, it seems as though his former coaches have great things to say about him and he is described as "gentle" in articles. So while I doubt this, I suppose there is a chance there are other issues that have not been made public.
3. The NFL has let teams know they don't want him in the league. I don't know how they would do this. I really don't tend to believe conspiracy theories, as a rule. But I suppose there is a way for Goodell to let the teams know the league prefers this kid not be a part of the NFL organization. I don't think this is likely or probably, but certainly possible.
I'm sure I could think of many more reasons, but would they be any more likely than these? I wish I could be more eloquent, but this is just weird to me. But based on some responses in this thread, perhaps there really are people who judge based solely on a label and refuse to look deeper at the reason for the label.
There are sex offenders who stalk and rape, and there are sex offenders who got caught taking a leak in some bushes too close to an elementary school. There are 30-year old men who are convicted of statutory rape of their 13-year old "girlfriends" while some convicted of the same crime are guys who just turned 18 and had sex with their 16/almost 17 year old girlfriend. Same label HUGE difference, IMO. While this guy may be a convicted sex offender, he hardly fits the profile most imagine, if the stories like this article are to be believed. I would think the NFL, or any individual team, could get a lot of positive mileage out of signing a guy like this if they properly managed the story. But that would involve risk I suppose. And I guess it's worth it when a guy is as talented as Michael Vick, but not when he is unproven in the NFL.