associated press
Mario Williams, the No. 1 pick in the 2006 draft, played in only five games last year before tearing a chest muscle.
Buffalo Bills' Mario Williams smiles while being introduced during an NFL football news conference after signing with the team in Orchard Park, N.Y., Thursday, March 15, 2012. Williams signed a contract touted as the richest ever given to an NFL defensive player _ a deal worth up to $100 million with $50 million guaranteed, according to his agent, Ben Dogra. (AP Photo/David Duprey)

associated press Mario Williams, the No. 1 pick in the 2006 draft, played in only five games last year before tearing a chest muscle. Buffalo Bills' Mario Williams smiles while being introduced during an NFL football news conference after signing with the team in Orchard Park, N.Y., Thursday, March 15, 2012. Williams signed a contract touted as the richest ever given to an NFL defensive player _ a deal worth up to $100 million with $50 million guaranteed, according to his agent, Ben Dogra. (AP Photo/David Duprey)