Tim Tebow remains unsigned and members of his camp are privately admitting that his career in the NFL may be over.

Tebow led the Denver Broncos to a playoff win during the 2011 NFL season, but was traded to the New York Jets when the team acquired Peyton Manning.

Tebow was cut by the Jets in April and no team appears willing to gamble on his questionable abilities at quarterback combined with the media circus that follows his every move as one of the most polarizing players in recent memory. But Tebow's abilities as a leader and a quality teammate are unquestioned.

Tebow has struggled badly with the mental side of the game, according to one source. Tebow scored below average on his Wonderlic test and is more of a kinesthetic learner.

Tebow has been offered a backup role in the Canadian Football League, though he could presumably start in the Arena Football League.

"There's no going halfway with Tebow anymore," said Tony Dungy. "You either gotta sell out and give him the keys to your team or stay away. Because, unfortunately, there's too much attention for him to be a regular, developing backup like everyone else."