The Eagles have restructured the contract year deal with Philadelphia prior to the start of the 2011 season.
In 16 games last year, Jenkins had 40 tackles and 5 1/2 sacks. He registered four sacks over his first three games as an Eagle, becoming just the second defensive tackle in team history to open a season with one sack in each of the first three contests (Jerome Brown, 1991).
"We are very excited about having Cullen back on our football team," said general manager Howie Roseman. "Cullen made an immediate impact for us this year on and off the field. We look forward to a great future together with him in an Eagles uniform."
"Appreciate all the support and kind words from everyone. Exciting time for me and my family," Jenkins tweeted.
The Central Michigan product helped the Packers to the Super Bowl title after the 2010 season before joining the Eagles.