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A 4–3 base defense. In American football, a 4–3 defense is a defensive alignment consisting of four down linemen and three linebackers. It is called a "base defense" because it is the default defensive alignment used on "base downs" (1st and 2nd downs). However, defenses will readily switch to other defensive alignments (such as a nickel ...
A fire zone blitz is a specific zone blitz in which the defense rushes 5 with a 3–3 coverage behind it—three deep defenders and three underneath defenders. Although the fire zone can be run out of many fronts and alignments, the main points are the weakside defensive end or end man on the line of scrimmage away from the blitz dropping off ...
The 3–4 defense was originally devised by Bud Wilkinson at the University of Oklahoma in the 1940s as the 5–2 Oklahoma defense. The first NFL team to regularly employ the 3–4 was the 1974 New England Patriots under Chuck Fairbanks , who employed the 5–2 for all but one of his six seasons (1967–72) as head coach of the Oklahoma Sooners ...
Strategy is a major part of American football. Both teams plan many aspects of their play, such as what formations they take, who they put on the field, and the roles and instructions each player is given for both offense and defense. Throughout a game, each team responds to the other's apparent strengths and weaknesses, trying various ...
American football positions. A diagram showing an I formation on offense and a 4-3 formation on defense. In American football, the specific role that a player takes on the field is referred to as their "position". Under the modern rules of American football, both teams are allowed 11 players [ 1] on the field at one time and have "unlimited ...
Cover 4, or quarters, refers to 4 deep defenders each guarding one-fourth of the deep zone. Cover 4 schemes are almost always used to defend against deep passes. [10] (See also Prevent defense). The most basic Cover 4 scheme involves 3 CBs and 2 safeties. Upon snap, the CBs work for depth, backpedaling into their assigned zone.
46 defense. 46 Formation, original 4–3 base set. The 46 defense is an American football defensive formation, an eight men in the box defense, with six players along the line of scrimmage. [ 1] There are two players at linebacker depth playing linebacker technique, and then three defensive backs. The 46 defense was originally developed and ...
The "Phillips 3–4", a one-gap version of the 3–4, was also brought into the league by Bum Phillips, head coach of the Houston Oilers in the 1970s. The Phillips 3–4 defense is currently run by the San Diego Chargers as well as the Dallas Cowboys formerly coached by Wade Phillips, the son of Bum Phillips. Wade Phillips replaced Joe Collier ...