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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 ...
Like a Sam linebacker in a 4–3 scheme, the other 3–4 OLB must be able to cover, blitz, and play the run. Strengths of the 3–4 include speedy ILBs and OLBs in pursuit of backs in run defense and flexibility to use multiple rushers to confuse the quarterback during passing plays without being forced into man-to-man defense on receivers.
In American football, the 4–4 defense is a defensive alignment consisting of four down linemen and four linebackers . Originally seen as a passing defense against the spread, modern versions of the 4-4 are attacking defenses stocked with multiple blitz packages that can easily be concealed and altered. [ 1][ 2] The modern defense is based on ...
The dark green rectangles show zones. Zone coverage (also referred to as a zone defense) is a defensive scheme in gridiron football used to protect against the pass. Zone coverage schemes require the linebackers and defensive backs to work together to cover certain areas of the field, making it difficult for the opposing quarterback to complete ...
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 ...
Cornerback. A cornerback ( CB) is a member of the defensive backfield or secondary in gridiron football. [ 1] Cornerbacks cover receivers most of the time, but also blitz and defend against such offensive running plays as sweeps and reverses. They create turnovers through hard tackles, interceptions, and deflecting forward passes.
Catenaccio. Karl Rappan's verrou, a predecessor to the catenaccio. Catenaccio ( Italian pronunciation: [kateˈnattʃo]) or The Chain is a tactical system in football with a strong emphasis on defence. In Italian, catenaccio means "door-bolt", which implies a highly organised and effective backline defence focused on nullifying opponents ...
The Seattle Cover 3 is a Cover 3 defense crafted by Seattle Seahawks coaches Pete Carroll and Dan Quinn that helped the team reach Super Bowls in 2013 and 2014, winning XLVIII. The defense used a 4-3 base formation while incorporating 3–4 defensive principles using a hybrid defensive end - linebacker position known as the Leo. [2]