Now that the Green Bay Packers have receiver Jordy Nelson signed to a contract extension, you might think the next player in line for a new deal could be Randall Cobb.

He wouldn't agree.

"I don't believe I've done enough," Cobb said Sunday, "and I think that's on me."

Cobb's comments came a day after Nelson signed a four-year, $39 million contract extension.

Cobb, 23, is entering the final season of the rookie contract he signed in 2011 after the Packers picked him in the second round. He had a breakout season in 2012, when he caught 80 passes for 954 yards and eight touchdowns.

Last season, he was on pace for more than 90 catches and 1,200 yards until he sustained a fractured tibia against the Baltimore Ravens on Oct. 13 when safety Matt Elam hit him in the leg. Cobb missed the next 10 games but returned for the regular-season finale against the Chicago Bears and caught a 48-yard touchdown pass on fourth down with 38 seconds left that won the game and gave the Packers the NFC North title.