Sources: 49ers' Smith paying to play in '14

[ESPN]

Aldon Smith, who is eligible to return to the 49ers this week after serving a nine-game suspension, will become one of the rare, if not the only player in league history, to pay for the privilege of playing football, according to sources.

http://espn.go.com/nfl/story/_/id/11846677/aldon-smith-san-francisco-49ers-paying-play-14