From "Take your eyes off the ball"
The outside backers are the true glamour position in the 3-4 defense. They are the premier pass rushers in the mold of Lawrence Taylor—who revolutionized the position during his Hall of Fame career—Rickey Jackson, Andre Tippett, and Kevin Greene. Guys like Shawne Merriman, DeMarcus Ware, and Pittsburgh’s pair—LaMarr Woodley and James Harrison—are today’s prototypical 3-4 linebackers, guys with the speed to bring pressure off the edge, the strength to take on tackles, and the athleticism to drop into pass coverage. While the Patriots built their line with draft picks, they found their outside linebackers on the free-agent market—guys like Rosevelt Colvin, Mike Vrabel, and Adalius Thomas, all of whom were standout defensive ends in college. Since very few college teams play a 3-4 scheme, NFL coaches are always looking for undersized college ends with pass-rushing skills but not necessarily the big, bulky body of a traditional lineman. During individual workouts, they’ll test a prospect’s agility, have him drop into the flat, throw balls at him to judge his hands, and make sure he’s athletic enough to open his hips. If they have the requisite athleticism, many great rush ends in college will find their NFL home is at outside linebacker in a 3-4. A 3-4 defense obviously needs two inside linebackers—preferably of different types. One has to be able to play over the strong side guard. The strong inside backer ideally should be a 6'3", 250-pound thumper who can step up and engage a guard with power (think the Jets’ David Harris, who is 6'2", 245). The weak inside linebacker—the guy who lines up on the same side as the split end—can be a bit smaller because the guard on the weak side isn’t going to get out to him as much, allowing him more free space to run and hit (Exhibit A would be Baltimore’s Ray Lewis).
Job Descriptions: 4-3
Unlike the 3-4, the 4-3 front comes with little mystery. Unless a defense is in a Fire Zone blitz situation (which we’ll talk about in the next chapter), the offense knows who’s coming—the four down linemen are going to bring the heat. When they are able to get pressure on the backfield—tying up five offensive linemen with a four-man line—it’s a tremendous advantage for the defense, which now has seven guys in coverage against, at most, five receivers. You want to know what NFL teams are looking for when building a defensive line for a 4-3? Look no further than the 2009 Minnesota Vikings: Kevin Williams (6'5", 311) and Pat Williams (6'3", 317) at tackle, Jared Allen (6'6", 270) and Ray Edwards (6'5", 268) at end. Those are four guys with the size and quickness to get into the backfield and disrupt an offense.