Pass-rushers come in all shapes and sizes. But they are always at a premium.
Although they are difficult to find, there are a few tremendous interior forces when attacking quarterbacks. Those can be true upfield defensive tackles or even ends such as Justin Tuck who are versatile enough to move inside on passing downs.
But most great quarterback killers come off the edge, and this list reflects that. But edge-rushers also come in all shapes and sizes. Some are defensive ends in the 4-3, while others are pass-rushing outside linebackers in the 3-4. Some are tall, linear athletes with great wingspans, while others are shorter and built for leverage. Some pass-rushers rely on power, technique or speed. But every esteemed member of this group is more than just a one-trick pony.
One thing is certain: All can harass quarterbacks extremely well. These are the best of the best.
DeMarcus Ware, LB, Cowboys: Ware has it all. He has great quickness, but is also incredibly smooth and fluid with all his movements. Ware has a very long, lean athletic body type that he uses extremely well to keep blockers away from his frame, but also gets low and demonstrates great leverage. He also has a full array of pass-rush moves and a great motor to cap it all off. Ware already has four sacks in three games this year. Oh yeah, he also had 20 sacks in 2008.
Dwight Freeney, DE, Colts: If Freeney has lost a step, it is hardly noticeable. His body of work is amazing, but so is what he is doing now. Before his ankle injury last season, Freeney might have been rushing the passer at a higher level than at any point of his career. I also tend to think that the Super Bowl might have ended a little differently if the Colts’ best defensive player had been healthy. Despite that injury, Freeney did notch 13.5 sacks in 2009.
Mario Williams, DE, Texans: This ultra-talented young man has come into his own in 2010. Only two players have more sacks this season than Williams (five). And he is one player on this list who is continually double-teamed. Few players look the part like Williams, and his skill set is off the charts. He has power, the body and closing speed. Now he is putting it all together. The league is taking notice.
Julius Peppers, DE, Bears: Peppers was great in Carolina, but looks rejuvenated -- and much more dangerous and consistent -- since joining the Bears. Peppers and Williams are the two players on this list who are just a different breed of athlete. Peppers and Williams are bigger and more gifted than the others. Although the Bears invested a small fortune in this great player, they must be happy with their investment to this point.
James Harrison, LB, Steelers: One of the functionally strongest players in the league, Harrison is a master at staying low and bullying his opponent. But his flat-out tenacity is what sets him apart. He got to the quarterback 16 times in 2008 and is also one of the very best in the business at dislodging the football when he does reach the quarterback. Harrison arrives with violence. Harrison and teammate LaMarr Woodley (see below) are probably the two best of this top 10 at setting the edge and playing the run.
Clay Matthews, LB, Packers: Bred to play the game, Matthews leads the NFL with seven sacks. Despite more or less learning a new position, he notched double-digit sacks as a rookie. He is a terrific blend of athletic ability, which he displays really well bending the edge without losing leverage or speed. But it is his technique -- most noticeably his use of his hands -- and overall tenacity that make Matthews special.
Robert Mathis, DE, Colts: Mathis is averaging a sack per game thus far in 2010, and the Colts have not played with their accustomed leads. Mathis benefits from Freeney being on the other side and also plays in the ideal conditions to use his amazing speed, but that should not take away from what he brings off the edge.
Jared Allen, DE, Vikings: Allen was second in the league in sacks last year, and from 2007 to 2009, Allen notched a whopping 44.5. Allen has begun this season rather slowly in this department, but the Vikings have played only three games and his track record speaks for itself. Not only is he a tremendous hustle player, but he uses his length extremely well.
Tamba Hali, LB, Chiefs: Hali doesn’t get the credit he deserves or the accolades of the others on this list. In fact, Kansas City has really struggled to get after opposing quarterbacks over the last few years. But don’t blame Hali. He has recently blossomed into a great 3-4 outside linebacker after spending time as a defensive end in Herm Edwards’ Cover 2 scheme. The Chiefs are starting to get some recognition. Go out of your way to watch Hali. You will not be disappointed.
LaMarr Woodley, LB, Steelers: He has been great this year, but was out-of-this-world the second half of last season. He is one of the few pass-rushers on this list who usually lines up against slower-footed right tackles, but he can win one-on-one with technique, quickness or power. Woodley is just reaching his prime and will only get better.
Scouts Inc. watches games, breaks down film and studies football from all angles for ESPN.com.