A good example of a Fairbanks-Bullough 3-4 defense is the Patriots defense. The Fairbanks-Bullough is commonly referred to as an 2-gap 3-4 system that gives teams the greatest amount of flexibility compared to other 3-4’s. The linebackers in this system are extremely versatile and are capable of doing any and everything on the field. (I.e.; Mike Vrabel) When you mix the roles of the four linebackers from play to play, you can cause mass confusion for an offense. The reason this system is a 2-gap system, is because the defensive lineman are required to cover the gaps on both sides of an offensive lineman. The defensive linemen in this 3-4 are very stout so that they can occupy the offensive lineman, and allow the linebackers can make plays.