Campbell has made the Pro Bowl in six of the last seven seasons as a late bloomer at age 35. However, he played a career-low 12 games last season, and has seen his sack total decline recently. Campbell is clearly on the backend of his career.
Graham is a five-time Pro Bowler, but his last invite was 2017. The wear and tear have accumulated over the years as Graham has declined on the field. With the growth of Cole Kmet, Graham could see his way out of Chicago and the NFL after his forthcoming age 35 season.
Henne saw several seasons early in his career as a starter in Miami and Jacksonville, but recently he's remembered for his great plays in the AFC Divisional Round last year against the Browns after Patrick Mahomes was injured. Henne enters his age 36 season as Mahomes' backup and could move on soon.
Incognito revitalized his career with the Raiders after struggles on and off the field earlier in his career. He played only two games last season due to injury but is giving it one more go at age 38.
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Mark Ingram, RB, Texans
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Despite missing time to injury late last year, Ingram is getting another chance at playing time with Houston this season. He will turn 32 this season, an age when many running backs decide to hang up their cleats.
Ingram moved on from the Chargers after nine productive seasons. He joins Pittsburgh as a pass rusher role but failed to record a sack in seven games last season. This could be his final opportunity at age 32.
Jenkins has been one of the faces of the NFL for the last several years and continues to be a productive leader for the Saints in his mid-30's. He will turn 34 in December, which could be his final season.
Kerrigan has become a role player recently and recorded a career-low 5.5 sacks in back-to-back seasons. The Eagles will install him in the same role this season at age 33, in what could be his final season.
Lewis has had a very limited role in his three seasons with the Packers but continues to prosper as a blocker. The tight end is now 37 and could be entering his last season.
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Kyle Long, OL, Chiefs
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Long came out of retirement to join the Chiefs but missed all of training camp due to a leg injury. The oft-injured lineman hopes to make a contribution off the bench later this year, but it remains to be seen how much he has left.
Mack reunited with Kyle Shanahan this season, after playing under Shanahan in Atlanta. The five-time Pro Bowler is clearly making an effort to win a Super Bowl as he nears the end of his career at age 35.
A nine-time Pro Bowler and likely future Hall of Famer, Peters is giving the Bears much-needed help after spending the last 12 years in Philadelphia. He's struggled with injuries in recent seasons and is now one of the oldest players in the league at 39.
There were whispers that Rodgers would retire in the offseason due to his falling out with the Packers front office. He opted to return, but there's no telling what the next offseason will bring. He could call it quits for a career off the field at age 38.
The last two years have been a rollercoaster for Big Ben due to injury and decline, but the Steelers and Roethlisberger are giving it one more go. He enters his age 39 season hanging on to Super Bowl hopes.
The Seahawks moved on from Wright in the offseason despite starting 16 games. He's moved to Vegas at age 32 but seemed to have a very quiet free-agent market.
Seth Trachtman is a fantasy sports expert and diehard Kansas City Chiefs fan still hoping for a Super Bowl win during his lifetime. He doesn't often Tweet, but when he does, you can find him on Twitter @sethroto.