5-2 defense
Encyclopedia
In American football, the 5-2 defense is a defensive alignment consisting of five down lineman and two linebacker
Linebacker
A linebacker is a position in American football that was invented by football coach Fielding H. Yost of the University of Michigan. Linebackers are members of the defensive team, and line up approximately three to five yards behind the line of scrimmage, behind the defensive linemen...

s.

The defensive linemen almost always line up to the weak side, with the backside lineman on the outside shoulder of the end man on the offensive line of scrimmage
Line of scrimmage
In American and Canadian football a line of scrimmage is an imaginary transverse line beyond which a team cannot cross until the next play has begun...

.

Because the extra defensive lineman makes this a strong defense against the run, it is more popular in leagues (or specific situations) that favor the running game. Thus, this defense is most often used in middle school and little league, and occasionally in different looks and variations in the NFL or college. The 5-2 used to be more popular in college football, when the running game was much more prevalent; for example, teams in the 1980s would often employ the 5-2 to combat the extremely run-oriented offenses of the time. From the mid-1950s until the early 1990s, the 5-2 was the base formation for most teams in the Big Eight Conference
Big Eight Conference
The Big Eight Conference, a former NCAA-affiliated Division I-A college athletic association that sponsored football, was formed in January 1907 as the Missouri Valley Intercollegiate Athletic Association by its charter member schools: the University of Kansas, University of Missouri, University...

, due to the powerful rushing attacks of the Nebraska Cornhuskers
Nebraska Cornhuskers
The Nebraska Cornhuskers is the name given to several sports teams of the University of Nebraska–Lincoln. The university is a member of the Big Ten Conference...

 and Oklahoma Sooners
Oklahoma Sooners
The University of Oklahoma features 19 varsity sports teams. Both men's and women's teams are called the Sooners, a nickname given to the early participants in the land rushes which initially opened the Oklahoma Indian Territory to non-native settlement. They participate in the NCAA's Division I-A,...

, and later in the 1980s, the Colorado Buffaloes
Colorado Buffaloes
The University of Colorado Boulder sponsors 16 varsity sports teams. Both men's and women's team are called the Buffaloes or Golden Buffaloes . "Lady Buffs" referred to the women's teams beginning in the 1970s, but was officially dropped in 1993...

. Currently, the Arizona Cardinals use this defense regularly, in addition to their base 3-4.

The benefit of having a 5-2 is that it adds size to your defense by replacing a linebacker with a defensive lineman. This helps in short-yardage situations where you want to stall the line of scrimmage and not give up the inside run. The disadvantage is in pass coverage -- most 5-2 teams will rush all 5 defensive linemen leaving only 6 pass defenders. In some circumstances a 5-2 team will drop one of the linemen, typically an end, off into coverage. But this is primarily a situational defense, and not often used in situations where downfield pass coverage is a significant concern.
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