Introduction

Every football team needs a strong defense to counter the opponent's offense. The defense is made up of two main parts:

• The Defensive Line
• The Secondary

Linebackers (LB)

Linebackers line up just behind the defensive line and provide extra protection on running plays or passing plays depending on the coverage. As a result, the linebacker's job description will vary based on the play call. That's why defensive linebackers are such an important and versatile position in football.

• to prevent the forward-progress of the ball-carrier
• to prevent the completion of passes
• to prevent scores
• to sack the quarterback

4-3 Defense

In a 4-3 defense there are four (4) players in the defensive line on the line of scrimmage and three (3) linebackers LB on the field.

3-4 Defense

In a 3-4 defense there are three (3) players in the defensive line on the line of scrimmage and four (4) linebackers LB on the field.