Sione Pouha is one of the top run-stuffers in the NFL, but he turns 33 on Feb. 3. His best days are behind him.
Jason Jones, DT, Titans. Age: 26. Signed with Seahawks (1 year)
Jason Jones thrived as a defensive tackle in a wide-nine scheme prior to this season. He was moved to defensive end in 2011 and consequently struggled. Jones needs to go to Detroit, Philadelphia or St. Louis this spring.
Sammie Lee Hill (RFA), NT, Lions. Age: 25. Re-signed with Lions (1 year, $1.26 million)
Sammie Hill is a young, skilled run-stuffer who offers decent pass-rushing ability for someone his size (6-4, 330).
Albert Haynesworth, DT, Buccaneers. Age: 31.
There's a misconception that Albert Haynesworth played poorly for the Buccaneers last season. He didn't; he was decent at times, but wasn't worth the $7.2 million price tag - or the headaches that come with his lack of effort. He's still immensely talented, however, and he could be motivated for a new contract. He's definitely worth the risk for a 1-year "prove it" deal.
Brodrick Bunkley, DT, Broncos. Age: 28. Signed with Saints (5 years, $25 million; $9 million guaranteed)
Brodrick Bunkley had a great year as a run-stuffer, but he offers nothing in the pass-rushing department.
Derek Landri thrived as a reserve defensive tackle in 2011, getting good pressure on the quarterback and helping shut down the run. Not bad for a guy who was among the final cuts prior to the season.
Antonio Garay, NT, Chargers. Age: 32. Re-signed with Chargers (2 years)
Antonio Garay is no longer the player he once was, but he is still a decent run-stuffer.
Antonio Dixon (RFA), DT, Eagles. Age: 27. Re-signed with Eagles (1 year)
Antonio Dixon functioned as an excellent run-stuffer in 2010, but he missed most of this past year with torn triceps. He's a poor fit in Jim Washburn's scheme anyway, so the Eagles might just put a really low tender on him.
Luis Castillo, DE/DT, Chargers. Age: 29.
Luis Castillo still has the talent to start, but he's always hurt. He's way too unreliable to receive a contract with lots of guaranteed money.
2012 NFL Free Agency: Star rating is out of five. Age listing as of Sept. 1, 2012.
Follow me @walterfootball for updates.
Calais Campbell, DE/DT, Cardinals. Age: 26. Re-signed with Cardinals (5 years, $55 million; $31 million guaranteed)
You could argue that aside from Justin Smith, Calais Campbell is the best 3-4 defensive end in all of football. Campbell has no weaknesses; he's a ferocious pass-rusher, he blocks kicks, and he can even drop into coverage pretty well. And he'll be 25 until Sept. 1.
Paul Soliai, NT, Dolphins. Age: 28. Re-signed with Dolphins
At 6-4, 355 pounds, Paul Soliai is a monstrous, run-stuffing nose tackle. He made $12.3 million with the franchise tag this season.