View source for Blitz (gridiron football)

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In [[American football]] or [[Canadian football]], a '''blitz''' is when additional players are sent to "rush the [[quarterback]]"--that is, try to [[tackle (football move)|tackle]] the quarterback or disrupt his [[forward pass|pass]] attempt. The term is borrowed from the [[Blitzkrieg]], the [[Wehrmacht|German]] strategy of "Lightning War" employed during [[World War II]].  Like the Blitzkrieg, the blitz is a concentration of force at high speed to force a breakthrough and proceed without regard to the flanks.

==History==
The birth of the blitz is considered to be on December 1, 1957, when the defense of the [[San Francisco 49ers]] forced five fumbles against [[quarterback]] [[New York Giant]] [[Chuck Conerly]].<ref>Gruver, 2002 pg. 72</ref> [[Don Ettinger]], a [[linebacker]] for the [[New York Giants]], invented the blitz during his brief [[NFL]] career (1948 &ndash; 1950).{{citation needed|date=March 2011}} 

Initially, the term "Red Dog" was coined in 1961 by longtime San Francisco 49er announcer Bob Fouts, during a training camp photo op with his Irish Setter Casey posed with his front legs raised up on quarterback John Brodie.  From there he used the term when describing a linebacker rushing the opposing quarterback, although the term was later supplanted by 'blitz.'<ref>{{cite web|url=http://gamerewind.nfl.com/nflgr/console.jsp|publisher=National Football League|accessdate=16 October 2012|title=Archive Game of Super Bowl III}}.  In [[Super Bowl III]] of January 1969, for instance, sportscasters refer repeatedly to the red dog, and never use the term blitz.</ref> 

[[Larry Wilson (American football)|Larry Wilson]], [[free safety]] for the [[Arizona Cardinals|St. Louis Cardinals]] from 1960 to 1972, pioneered and perfected the ''safety blitz'', a play originally code-named "Wildcat." Defensive coordinator [[Chuck Drulis]] is widely credited with inventing the safety blitz. Pittsburgh Steelers defensive coordinator [[Dick LeBeau]] is widely regarded as the inventor of the [[zone blitz]].

==How blitzing works==
On passing plays, the offense always has at least five men blocking. From the quarterback's left to his right, they are: left tackle, left guard, center, right guard, right tackle.  Depending on the personnel, formation, and blocking principles the offense uses, they can have a maximum of nine players blocking on any given pass play (this type of maximum protection is succinctly called "Max Protect"). Since the quarterback is throwing the pass, he cannot block and must have at least one receiver to catch the pass. Assuming the lone [[wide receiver]] is covered by a defensive back, this leaves the defense ten players to rush the quarterback versus the offense's nine blockers — the offense is outnumbered and at a disadvantage. Because the quarterback cannot block during passing plays, the defense always has one more man available to rush than the offense can block.

Usually offenses do not max protect, varying the levels of protection available depending on the play design and the quarterback's pre-snap read of the defense. The more receivers the offense has running passing routes, the better their chances are of completing the pass.  This factor allows defenses to devise and execute a staggering variety of blitz packages between any number of their coverage personnel, trading tight coverage of receivers for proactive aggressive disruption of the play.

By nature, blitzes are risky endeavors for the defense. Since the defense is taking away coverage defenders to rush the quarterback, this usually means that the [[defensive back|secondary]] can't afford to miss any coverage assignments.  The defense does not and cannot cover all offensive players, but rather through the blitz, is proactively involved in pressuring the quarterback — specifically, trying to [[quarterback sack|sack]] him, throw off his timing, or force him to make an error such as an [[interception]] or [[fumble]].

The most common blitzes are linebacker blitzes. Safety blitzes, in which a [[safety (American football position)|safety]] (usually the free safety) is sent, and corner blitzes, where a [[cornerback]] is sent, are less common. Sending a defensive back on a blitz is even riskier than a linebacker blitz, as it removes a primary pass defender from the coverage scheme.  The pressure, however, is very severe because a blitz by a defensive back is usually not anticipated by the offensive team’s blockers.

==Defensive shells and techniques==
Blitzes are usually run from "[[American football strategy|Cover 1]]" coverage shells, which assign one man to guard the entire deep field, though blitzes can be employed in nearly any coverage scheme. Cover 1 is most effective because it allows a larger number of defensive players to tighten down on the line of scrimmage, thus increasing the variety of blitzes possible.

Since the main goal is to disrupt the offensive play before it even develops, many blitz packages encourage cornerbacks to play tight man [[bump and run coverage]] to disrupt the wide receivers' release and prevent them from running their pre-assigned routes. The non-blitzing safety, usually the free safety, has an enormous amount of field to protect and is at a serious disadvantage if the blitz is unsuccessful and receivers threaten his coverage area. As such, he usually works for depth upon the snap of the ball, backpedaling into his assigned zone.

Linebackers are either blitzing or in pass coverage. Blitzing [[linebacker|LB]]s can employ various stunts to confuse the offense's blockers and break down their protection scheme. Coverage LBs in a Cover 1 scheme will usually have man responsibility on a [[Running back|halfback]], [[fullback (American football)|fullback]], or [[tight end]].

Some defensive schemes employ "key" blitzes where a player will blitz only if his assigned man stays in to block, this keying his action off the action of his man. If his man releases into a pass pattern, then the defensive player will cover him. For example, if weak side linebacker has the fullback as his man, if upon the snap of the ball the fullback blocks, the linebacker will blitz.

Lineman can also be blitzers.

==Advantages and disadvantages==
Advantages gained by blitzing are obvious: proactively disrupt the [[American football positions#Offense|offense's]] play before it develops and cause enough [[pressure]] on the [[quarterback]] to force him into a [[Turnover (football)|turnover]], sack or incomplete pass.

Disadvantages abound in any blitz scheme as well. First, the [[offensive linemen]] are usually trained to recognize a blitzing player before the snap of the ball. They [[communicate]] with each other at the [[line of scrimmage]] using [[code words]] that shift the protection to the blitzing player's side, thus strengthening their [[Blocking (American football)|blocking]] front. The [[quarterback]] can also call other players into the protection scheme with [[Quarterback#Special_tactics|audibles]] if he feels that his current protection is weak. With good protection calls and fundamental blocking principles, some blitzes can be "picked up" — stopped at the point of attack.

Second, the tight man bump and run technique typical of blitz scheme cornerbacks can be defeated with aggressive wide receiver release moves. Once this happens, the cornerback is at a disadvantage and must regain ground and position quickly to prevent a catch. If the blitz is picked up, the wide receiver can create enough separation to become open relatively quickly.

Third, if the blitz is picked up, the one deep defender (usually the free safety) has an enormous amount of territory to guard. If two players simultaneously threaten his zone, he must decide which one to cover. The quarterback can read his reaction and throw to the other receiver, usually for a big gain.

Fourth, if the pass is caught, there are fewer defenders and larger gaps between defenders, meaning that the receiver can get more yards after catch and possibly turn a minimal gain into a dangerous play.

== Playing against the blitz ==
Offenses employ the above procedures to beat the blitz as well as two other techniques and passing route combinations designed to exploit weaknesses in a blitzing scheme.

One of those techniques is called "throwing hot," which entails intentionally leaving one blitzing defensive player unblocked. The offensive line usually makes pre-snap adjustments so that the "free" rusher is clearly within the QB's field of vision. This limits devastating blind-side hits on the QB by rushers.  When the preparedness of a quarterback allows him to not have to worry about getting hit from behind, it's one less psychological element of the blitz to be taken away, and thus blitz is incrementally made less effective by that particular element.

The other technique, sometimes used in conjunction with throwing hot, is called sight adjustment. Receivers are taught to run into the empty spot vacated by a blitzing player instead of running their pre-assigned pattern. The QB sees the free rusher or blitzing LB/CB and knows that the receiver will sight adjust accordingly and run a route that takes him into the hole left by the defender.

The [[West Coast Offense]] is an offense that focuses on ball control and short [[Forward pass|passes]]. This is a well timed offense where the [[quarterback]] throws the ball quickly to avoid the rush, but still allow the [[wide receiver]] to get behind the blitzing players.

Another method is a trick play, known as an "offensive blitz", because it is used when the defense blitzes.  A quarterback throws a pass to a receiver to draw the remaining defenders to him, because the blitzers will be in the backfield, and the quarterback runs down the other side of the field; the receiver then throws the ball back to the quarterback with a lateral, who then tries to run in for a touchdown. If executed properly, this can get either a touchdown or a huge chunk of yardage, and heavily discourage blitzing. Ideally, the blitzing defenders are all in the backfield while the corners are all over the receiver. The [[New England Patriots]] and [[Pittsburgh Steelers]] have run variations of the play successfully in the [[National Football League]] [[NFL playoffs|playoffs]].

==See also==
*[[Glossary of American football]]
*[[Zone blitz]]

==Citations==
{{reflist}}

==Sources==
*Gruver, Edward (2002), ''Nitschke''. Lanham:Taylor Trade Publishing. [[International Standard Book Number|ISBN]] [[special:BookSources/ 1589791274|ISBN 1-58979-127-4]]

==External links==
*[http://www.examiner.net/stories/011802/spe_011802061.shtml# Don 'Red Dog' Ettinger]{{dead link|date=March 2011}}
*[http://www.profootballhof.com/hof/member.jsp?player_id=232 Lawrence (Larry) Frank Wilson]

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{{American football concepts}}

[[Category:American football plays]]