Cyder
Justin
Its really a no brainer to go with Manning over well... anybody.
Then he's got this wildly popular thing going on that seems to be almost more a curse than a blessing. His supporters are/were so over the top, and the media fawning, that there has been alot of backlash of people that find it nauseating, so he has proven to be divisive in the fan base, spawning a boatload of haters.
And that can be a strange dynamic to have in the locker room for a backup player. I think Jacksonville almost had no choice but to pass on him is there is no way that a starter would get a fair shot there. You would hope two years later that all that would fade and be in the past and people would let the guy just get on with his career.
There really is no good football reason why he isn't in a training camp. He is more than good enough to make a roster, and especially if he can contribute on special teams, he should be a valuable guy to have on your team as teams don't really like to have a third stringer active who can't do something else.
From what I remember he's doing pretty well with the ACC network so maybe they're paying him more than he'd make as a 3rd stringer/special teams player. That could factor in as well