The deal, worth $1.25 million in base salary and up to $1.75 million total, was reached a few days ago and somehow went unreported -- which is a miracle these days.
The Sideline View's Adam Caplan first reported news of the contract.
Blount rushed for 1,000 yards as a rookie in 2010, but his production has dropped to the point where he had only 41 carries in 2012. He's now the backup to phenom Doug Martin.
Blount, who was a restricted free agent, gives the Bucs a physical back to pair with the 5-foot-9, 215-pound Marin. That's a good combination for coach Greg Schiano's run-heavy system.
UPDATE: CBSSports.com's Jason La Canfora reports the Bucs are actively shopping Blount, according to league sources. Those sources told La Canfora that Blount might net a mid-round pick in return, perhaps a fifth-round selection. We'll keep an eye on this.
Follow Kareem Copeland on Twitter @kareemcopeland.