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Packers receiver Randall Cobb has been activated from injured reserve and has been listed as questionable for Sunday's crucial game against the Chicago Bears.

Cobb was the team's allotted player on injured reserve who was designated for return after getting hurt during a 19-17 win Oct. 13 at Baltimore. The playmaking wideout was added to the injury report Saturday with a knee injury.

Quarterback Aaron Rodgers (collarbone) is already returning Sunday and is expected to start against the Bears in the game to decide the NFC North title. Coach Mike McCarthy said he gave Cobb more work in practice Friday to help determine whether he should be activated.

Cobb caught 29 passes for 378 yards and two touchdowns playing the first five games this season for Green Bay (7-7-1).

Vikings rule injured RB Peterson out

The Minnesota Vikings have ruled out running back Adrian Peterson for their final game of the season.

The Vikings announced Saturday they downgraded Peterson from doubtful on the original injury report to out against Detroit Sunday, when the Vikings and Lions will play the last game at the Metrodome.

Peterson sprained his right foot Dec. 8 at Baltimore and sat out the following week against Philadelphia. He played last Sunday at Cincinnati but was mostly ineffective. Peterson acknowledged afterward the injury affected his performance. He has also been bothered this year by a sore groin.

Peterson finished the season with 1,266 yards rushing, the second-lowest total of his seven years in the NFL.

Bears, FB extend deal

The Chicago Bears signed fullback Tony Fiammetta to a two-year extension that will keep him with the team through the 2015 season.

Fiammetta has appeared in each of the Bears' first 15 games in his first season in Chicago, helping running back Matt Forte total 1,229 yards rushing — nine short of Forte's career high set in 2008.