Henry Melton, DT, Bears. Age: 26
Henry Melton is one of the top interior pass-rushers in all of football. He could stand to be better against the run, but he deserves a big contract after getting to the quarterback more effectively than Julius Peppers.
Randy Starks, DT, Dolphins. Age: 29.
Randy Starks is a talented interior pass-rusher. He struggled a bit down the stretch, but that could have been the result of personal issues he dealt with late in the year.
Richard Seymour, DT, Raiders. Age: 33.
Richard Seymour has been tremendous over the years, including the first half of this past season. Unfortunately, he missed the final eight games of his 2012 campaign because of a hamstring injury. He'll be 34 in October, so it's fair to wonder if his body is breaking down.
Desmond Bryant, DT, Raiders. Age: 27
Desmond Bryant served as a solid interior pass-rusher after Richard Seymour was lost for the year. Excluding Lamarr Houston, no other Raider defensive lineman was better at applying pressure on the quarterback, though that's not saying much.
Jason Jones, DT, Seahawks. Age: 27.
Jason Jones is a quality interior pass-rusher who was lost late in the year to a knee injury.
Sammie Lee Hill, DT, Lions. Age: 26
Sammie Lee Hill could start for some teams, as he does a decent job of pressuring the quarterback. He just hasn't had much of a chance in Detroit because he's been behind Ndamukong Suh, Nick Fairley and Corey Williams on the depth chart.
Roy Miller, DT, Buccaneers. Age: 26
Roy Miller doesn't offer anything as a pass-rusher, but he's a primary reason why the Buccaneers had one of the league's top run defenses in 2012.
Arthur Jones (RFA), DE/DT, Ravens. Age: 27.
Arthur Jones broke into the starting lineup in the middle of the season and performed well, stopping the run effectively and getting to the quarterback on occasion.
Mike DeVito, DE/DT, Jets. Age: 29.
Mike DeVito has been a key run-defender in New York's three-man front.
Steve McLendon (RFA), NT, Steelers. Age: 27.
Steve McClendon looks like a solid replacement for Casey Hampton. He performed well in the playoffs against the Broncos in January 2012, and that carried over into this season when he saw the field briefly.
Glenn Dorsey, DT, Chiefs. Age: 28.
Glenn Dorsey is a bust as the fifth-overall selection in 2008. He can stop the run when healthy, so he's serviceable in that regard. I'd also like to see what he can do in a 4-3, a system more suited toward his strengths.
Ropati Pitoitua (RFA), DE/DT, Chiefs. Age: 28.
Ropati Pitoitua has served as a solid rotational defensive lineman for the Chiefs. He's solid in run support and tallied two sacks in a game against the Chargers.
Terrance Knighton, NT, Jaguars. Age: 27
It's rare to see a 330-pound nose tackle struggle in run support, but that's why Terrance Knighton was benched in favor of C.J. Mosley back in October. He still played an ample amount though.
Sedrick Ellis, DT, Saints. Age: 28.
Sedrick Ellis has been an enormous bust for the Saints as the No. 7 pick in the 2008 NFL Draft. There's still time for him to turn his career around though.
Alan Branch, DT, Seahawks. Age: 28
Alan Branch is sort of a jack-of-all-trades defensive tackle. He has no glaring weaknesses and is at his best when stopping the run.
Ricky Jean-Francois, DE/DT, 49ers. Age: 26.
Ricky Jean-Francois handled himself well when inserted into the lineup in the wake of Justin Smith's injury. He's not much of a pass-rusher, but he contained the run well.
Casey Hampton, NT, Steelers. Age: 35.
Casey Hampton is still a quality run-stuffer despite his age (36 on Sept. 3).
Derek Landri, DT, Eagles. Age: 29.
Derek Landri is a solid rotational defensive tackle who can put pressure on the quarterback occasionally.
Corey Williams, DT, Lions. Age: 33.
Corey Williams should still be able to be a solid rotational lineman, but his best days are behind him. He played in only seven games in 2012.
Dwan Edwards, DT, Panthers. Age: 32.
Dwan Edwards can do a decent job of getting to the quarterback on occasion, but he has to be limited to passing downs because he gets gashed against the run.
SenDerrick Marks, DT, Titans. Age: 26.
SenDerrick Marks isn't particularly good at anything, but he's not really bad at anything either. He's a serviceable starter.
Kevin Vickerson, DT, Broncos. Age: 30.
Shaun Cody, NT, Texans. Age: 30.
Isaac Sopoaga, NT, 49ers. Age: 31.
Nate Collins (RFA), DT, Bears. Age: 25.
Antonio Johnson, DT, Colts. Age: 28.
Clinton McDonald (RFA), DT, Seahawks. Age: 26.
Kedric Golston, DE/DT, Redskins. Age: 30.
Vance Walker, DT, Falcons. Age: 26.
Justin Bannan, DT, Broncos. Age: 34.
Kenyon Coleman, DE/DT, Cowboys. Age: 34.
Rocky Bernard, DT, Giants. Age: 34.
Spencer Johnson, DT, Bills. Age: 31.
Tony McDaniel, DT, Dolphins. Age: 28.
Leger Douzable, DT, Titans. Age: 28.
Fili Moala, DT, Colts. Age: 28.
Pat Sims, DT, Bengals. Age: 27
Chris Baker (RFA), NT, Redskins. Age: 25.
Ryan McBean, DT, Ravens. Age: 29.
Corvey Irvin (RFA), DT, Buccaneers. Age: 28.
Maake Kemoeatu, NT, Ravens. Age: 34.
Andre Neblett (RFA), DT, Panthers. Age: 25.
Brian Schaefering, DE/DT, Cowboys. Age: 30.
Ty Warren, DT, Broncos. Age: 32.
Amobi Okoye, DT, Bears. Age: 26
Nick Eason, DE/DT, Cardinals. Age: 33.
Shaun Smith, NT, Chiefs. Age: 32.
Andre Fluellen, DT, Lions. Age: 28.
Trevor Laws, DT, Rams. Age: 28.
Shaun Rogers, DT, Giants. Age: 34.
Vonnie Holliday, DE/DT, Cardinals. Age: 37.