List of formations in American football

The following is a list of common and historically significant formations in American football. In association football, the formation describes how the players in a team are positioned on the pitch. Different formations can be used depending on whether a team wishes to play more attacking or defensive football.

Offensive formations
This list is not exhaustive; there are hundreds of different ways to organize a team's players while still remaining within the "7 on the line 4 in the backfield" convention. Still, this list of formations covers enough of the basics that almost every formation can be considered a variant of the ones listed below.

T formation


The T formation is the precursor to most modern formations, in that it places the quarterback directly under center (in contrast to its main competitor of its day, the single wing, which had the quarterback receiving the ball on the fly).

It consists of three running backs lined up in a row about five yards behind the quarterback, forming the shape of a T. It may feature two tight ends (known as the Power T) or one tight end and a wide receiver (in this case known as a split end). The latter variation is known as the Split T, created in 1941 by University of Missouri head coach Don Faurot. This is a running formation in which the option is effective. The T formation was made famous by the University of Minnesota in the 1930s and 1940s (winning five national titles). When legendary coach George Halas' Chicago Bears used the T-formation to defeat the Washington Redskins by a score of 73–0 in the 1940 NFL championship game, it marked the end of the Single Wing at nearly all levels of play, as teams, almost overnight, moved to formations with the quarterback "under center" like the T. George Halas is credited with perfecting the T formation.

One variation of the T-Formation would be where all the runningbacks would be closer than usual, being at fullback depth rather than halfback depth. Another variation of the "balanced T" formation is the so-called "unbalanced T" formation. In this configuration the line of scrimmage has an end and tackle left of center, while to the right of the center are two guards a tackle and an end. This creates a line that is weighted toward the right of the center. With the backfield lining up in the conventional "T" formation behind the center (quarterback, two halfbacks and fullback), the resulting configuration is "unbalanced" due the asymmetry of the placement of the linemen.

I formation
This is one of the most common formations used at all levels of football. It consists of two backs lined up behind the quarterback, with the back closest to the quarterback being called the fullback and the back behind the fullback called the running back, tailback, or I-back. The two backs line up either in a line (hence the name of the formation since it looks like a letter I) or with the fullback "offset" to either side. The fourth back is most commonly employed as an extra wide receiver. Here are three diagrams of I-Formation, strong side right (that is, with the tight end lining up to the right, typical for a right-handed quarterback). Notice that the 4th back required by the rules is the set-back wide receiver at the right (called the flanker). Two other I formation variations include the Maryland I and the Power I. These formations lack a flanker, and use the maximum 3 running backs rather than the standard 2. They are used primarily as running formations. These may employ either tight ends or split ends (wide receivers) or one of each. The Maryland I was developed by Maryland head coach Tom Nugent. More recently, Utah has utilized this formation with quarterback Brian Johnson.

Single set back
Also known as the "ace" formation, the single set back formation consists of one running back lined up about five yards behind the quarterback. The other 2 backs can either act as extra tight ends or wide receivers. This formation is normally used for a pass play, but can also be good for running, as defenders must move at least one player out of the middle of the field (the "box", between the tackles on the offensive line) to cover the additional wide receiver. In passing situations, this formation (and similar variations) is known as max protect as it requires the running back and two tight ends to stay in the vicinity to block an oncoming pass rush and leaves only two wide receivers to catch a pass downfield.

The basic single-back set does not employ a fullback and the addition of the extra flanker. Since he is lined up in the space between the tackle and the split end, he is called the "slot" receiver. This formation may be referred to as "single back, slot left".

A variation of the ace is known as the spread formation. It utilizes 4 wide receivers and no tight ends. In the NFL, this formation was the basis of the Run & Shoot offense that was popular in the 1980s with teams such as the Detroit Lions and the Houston Oilers but has since fallen out of favor as a primary offensive formation.

It is often used as a pass formation, because of the extra wide receivers. It also makes an effective run formation, because it "spreads the field" and forces the defense to respect the pass, thus taking players out of the box. Certain college programs, such as the University of Hawaii and Texas Tech still use it as their primary formation. Brigham Young University also uses the spread offense, although they tend to employ their tight ends more frequently than Hawaii and Texas Tech. Minnesota and TCU are also starting to employ the spread offense.

Joe Gibbs, twice head coach of the Washington Redskins, devised an ace variation that used a setback, or "flexed" tight end known as an H-back. In this formation, the normal tight-end is almost exclusively a blocker, while the H-back is primarily a pass receiver. This formation is often referred to as a "Two Tight End" set. Some teams (like the Indianapolis Colts under Tony Dungy) use this formation with both tight ends on the line and use two flankers. Many other teams in the NFL, even those that don't use this as a primary formation, still run some plays using a variant of this formation.

Pro set
Also called the "split backs" or "three-end formation", this is similar to the I-formation and has the same variations. The difference is that the two backs are split behind the quarterback instead of being lined up behind him.

Clark Shaughnessy designed the formation from the T Formation in 1949 after acquiring halfback Elroy "Crazy Legs" Hirsch. Shaughnessy thought he would make a great receiver but already had two great receivers in Tom Fears and Bob Shaw. Schaughnessy moved Hirsch to the flanker position behind the right end. Thus started what was known as the three-end formation.

This formation is most often associated with Bill Walsh's San Francisco 49ers teams of the 1980s and his West Coast Offense. It was also the favored formation of the pass-happy BYU Cougars under the tenure of legendary coach LaVell Edwards. A modern example of the "pro-set" can be seen in the Florida State University offense, which favors a Split Backs formation. The Seattle Seahawks under Mike Holmgren also favored this type of formation with the tight end usually being replaced with a third wide receiver.

Single wing
This archaic formation was popular for most of the first 50 years of modern American football, but it is rare today, except as a novelty. There are many variations of the single wing with really the only common thread being that, rather than lining up "under center", the quarterback is lined up a few yards behind with RBs on either side of him (similar to a modern shotgun formation).

The most famous version of the Single Wing offense would be Knute Rockne's "Notre Dame Box" that he ran with the Four Horsemen. It contained two tight ends, and 4 backs. The quarterback in this formation (called at the time a "single-wing tailback"), like today's shotgun QB, received the snap on the fly. The other 3 backs lined up on the same side of the QB in various arrangements. Also, the formation often featured an unbalanced line where the center (that is, the player who snapped the ball) was not strictly in the center of the line, but close to the weakside. The formation was originally designed as a brute-force running formation, since it had 7 players to one side of the center and only 2 on the other. Rockne's innovations with this formation involved using complicated backfield shifts and motion to confuse defenses, and adapting it as a passing formation. The single wing has recently had a renaissance of sorts with high schools; since it is so rare, its sheer novelty can make it successful.

Wildcat formation
Early in the 2008 season, the Miami Dolphins used a modern variant of the single wing formation known as the Wildcat formation. During the latter part of the 2008 season, and throughout the 2009 season, many different NFL teams instituted their own versions of the Wildcat. Some attribute the origins of the "Wildcat" to Bill Snyder’s Kansas State (whose sports teams are known as the "Wildcats") offense of the late ’90s and early 2000s, which featured a lot of zone read runs by the quarterback. Others attribute the origins to Hugh Wyatt, a Double Wing coach (See Double WIng discussion below). Both the Snyder and the Wyatt versions were different than the "Wildhog" version used by the University of Arkansas for their versatile running back Darren McFadden. Notably, the Cleveland Browns have used this formation with Josh Cribbs. As of 2011, nearly every NFL team has their own variation of the Wildcat. Ohio State University has also used the wildcat with Ted Ginn Jr. and Daniel "Boom" Herron. Villanova University won the 2009 Division I FCS championship using a multiple offense that incorporated the Wildcat. The University of Alabama employed the wildcat as part of their 2009 BCS championship team's offensive package and continues to use it today with playmakers Mark Ingram, Trent Richardson, and Marquis Maze (though with Maze it is nicknamed the "bobcat" due to his small stature).

Double Wing
The double wing, as a formation, is widely acknowledged to have been invented by Glenn "Pop" Warner in 1912. As an offensive system it is widely regarded as the invention of Don Markham, which revolved around the off-tackle power play, power sweep and trap. Markham ran very few plays, but blocked them according to defensive fronts and tendencies. A noticeable difference from the other teams lined up in the double-wing formation was the lack of line splits across the front. The Double Wing is combination of the I, which Markham initially ran the offense from in his earlier days, and the Wing-T 30 Series (Power Series). It is often referred to as the "bastard child of the I and the Wing-T". Breaking numerous state records everywhere Markham coached (and even setting the national high school scoring record) the "Markham Rule" was put into place to keep his team from winning by too many points. He is currently the Head Coach of Compton High School.



With Markham's success came many converts to his offense and many variations of the offense over the years. Perhaps the most well-known of Markham's converts is Hugh Wyatt, who brought more Wing-T to the offense and a greater ability to market the offense. In recent years the popularity of the offense has increased and brought some interesting variations and additions to the offense. Jack Gregory (American football coach) brought severe angle blocking into the mix which has become quite popular at the youth level. Similar to Wing-T 20 Series blocking it relies on track blocking as opposed to the "regular" double team scheme used by most Double Wing teams. Recently Gregory has changed the name of his severe angle blocking to TKO blocking (track and kick-out). Steve Calande has perhaps brought the best variation to Markham's Double Wing. Calande's GOD blocking (Gap-On-Down), although not groundbreaking at first glance, brings rule blocking in the offense to another level. The rules enable linemen to block any front and most importantly to do it with ease. For example, the man at the point of attack is the GOOD man (Gap-On-Over-Down) and has GOD (Gap-On-Down) inside of him (linemen to his inside). There are more to the rules than mentioned and his materials are available on his website.

The Double Wing is widely used at the youth level, becoming more popular at the high school level and has been used at the college level by none other than Don Markham at American Sports University.

Shotgun
The modern descendant of the Single Wing. The quarterback lines up about five yards behind the center, in order to allow a better view of the defense and more time to get a pass off. The shotgun can distribute its 3 other backs and 2 ends any number of ways, but most commonly employs one running back, lined up next to the QB, one tight end and three wide receivers. This formation is most commonly used for passing but the quarterback can also hand it off to a running back or run himself. Some teams use this as their primary formation, such as the New England Patriots and Indianapolis Colts. Most commonly, however, the Shotgun is used in long yardage situations, when the team is playing catch-up or in other obvious passing situations. The Shotgun's invention is credited to Red Hickey, coach of the San Francisco 49ers in 1960. Historically, it was used to great success as a primary formation in the NFL by the Tom Landry-led Dallas Cowboys teams of the 1970s and the 1990s Buffalo Bills teams under Marv Levy, who used a variation known as the K-gun that relied quarterback Jim Kelly. The shotgun offense has become a staple of many college football teams.



Pistol
This offense was originated by Chris Ault of the University of Nevada. It is essentially a shotgun variation, with the quarterback lined up closer than in standard shotgun (normally 3 to 4 yards behind center), and a running back lined up behind, rather than next to, the QB (normally at 3 to 4 yards behind quarterback).

The Pistol formation adds the dimension of a running game with the halfback being in a singleback position. This has disrupted the timing of some defenses with the way the quarterback hands the ball off to the halfback. This also allows the smaller halfbacks to hide behind the offensive line, causing opposing linebackers and pass-rushing defensive linemen to play more conservatively. The Pistol can also feature the option play. With this offense, the quarterback has the ability to get a better look past the offensive line and at the defense. Pistol formations have gained some popularity in NCAA football, and in fact, variants of this offense were used by the 2007 and 2009 BCS National Champions, LSU and Alabama, respectively.

In 2008, Kansas City Chiefs offensive coordinator Chan Gailey began using the Pistol prominently in their offense, and are the first NFL team to do so. He brought the philosophy with him to the Buffalo Bills in 2010. The San Francisco 49ers added the Pistol to their offense in after former Nevada quarterback Colin Kaepernick became the team's starter.

Wishbone
An option running formation popular in the 1970s and 80s. A variation of the T-formation invented at the University of Texas at Austin by offensive coordinator Emory Bellard. It consists of three running backs: a fullback lined up directly behind the quarterback, and the two shalfbacks split behind the fullback. It can be run with two tight ends, one tight end and one wide receiver, or two wide receivers. It is generally used in rushing play. The wishbone is an option offense, in which the quarterback decides after the snap whether to run, hand off, or pitch the ball. Notable college teams to run the Wishbone include Darrell Royal's Texas Longhorns of the late 1960s, Alabama in the early 1970s, Oklahoma in the late 1970s and early 1980s. As with any hugely successful formation or philosophy, as teams learned how to defend against it, it became much less successful. By 1990, few major programs were using the wishbone.

Flexbone
A common formation found in colleges and high schools. In this formation, one back (the fullback) lines up behind the quarterback. Both ends are often split wide as wide receivers, though some variations include one or two tight ends. The two remaining backs, called wingbacks or slotbacks, line up behind the line of scrimmage just outside the tackles. This formation is primarily used to run the option, especially the triple option. Often, one of the wingbacks will go in motion in the direction the play is being run in. The United States Air Force Academy (aka Air Force), the United States Naval Academy (Navy) and Georgia Tech are three college football teams that use this formation. This formation was first used by University of Texas coach Darrel Royal in the '60s and '70s. A common result from this formation is a fake to the fullback and then an option to one of the running backs.

Wing T
A formation similar to the Flexbone, though much older, is known as the "Delaware Wing-T" was created by longtime University of Delaware coach and NCAA Rules Committee chairman David M. Nelson, and perfected by his successor Tubby Raymond. It has become a very popular offense with high schools and small colleges. It was designed at the time to be a mix between the single wing and T-formation. It took the motion and run-strength of the single wing, and the QB-under-center from the T. In this variation, there is only one wing back, with the other back lined up next to the fullback on the opposite side from the wing back. However, the Wing Back may also line up diagonally from the Tight End. He may be used as an extra blocker or a receiver. He may come in motion for running plays.

Empty backfield
Also known simply as "Five-wide", a reference to the five wide receivers. In the empty backfield formation, all of the backs play near the line of scrimmage to act as extra wide receivers or tight ends. This is almost exclusively a passing formation used to spread the field, often to open up short inside routes or screen routes. It can also be run with one or two wing backs like the flexbone formation allowing a running game and the ability to run the option. The quarterback can line up either under center or in the shotgun. This formation is becoming more popular in the NFL and college football, with recent successes at Texas Tech University and by the New England Patriots in their record-setting 2007 season.

Goal line formation
Also called "jumbo", "heavy", "full house" or other similar names. As the name implies, this formation is used exclusively in short-yardage situations, and especially near the goal line. This formation typically has no wide receivers, and often employs 3 tight ends and 2 running backs, or alternately 2 tight ends and 3 running backs. Often, a tight end or full back position is occupied by a player who normally plays offensive line or defensive line positions to act as extra blockers. The Chicago Bears of the mid-1980s famously used defensive tackle William "The Refrigerator" Perry as a full back in this formation. In most cases, it is exclusively a running formation, designed to score by brute force. Some teams have successfully used this formation to pass out of, most famously the New England Patriots, who have used linebacker Mike Vrabel as a tight end to catch touchdown passes in both Super Bowl XXXVIII and Super Bowl XXXIX

Veer formation
The veer formation is a formation with two halfbacks lined up four and a half yards behind center on opposite sides of the quarterback who is under center. Two wide receivers are split out and a tight end is incorporated on one of the sides. The triple option is run most out of the veer.

Kneel


A special offensive formation is used at the end of a game, when a team has a lead and simply needs to run out the clock to win the game. The "kneel" or "victory" formation was developed in the 1978 NFL season after The Miracle at the Meadowlands, a botched final play in a game between the New York Giants and the Philadelphia Eagles which resulted in a fumble and a pivotal last-second score. This formation is intended for one purpose: to allow the quarterback to safely down the ball without losing control, preventing the defense from recovering and advancing the ball to the end zone. The formation features several stop-gaps in the event the quarterback does lose the ball: a seven-man line, the quarterback, two upbacks (running backs) immediately behind him, one at each side in the event he fumbles, and a fast player (usually a wide receiver or cornerback) several yards back as a last resort in case the defense recovers and is able to advance the ball.

Both the Giants and Eagles developed similar formations of this design. The Eagles named their version the "Herman Edwards" play after their cornerback who scored the winning touchdown on the above fateful play.

Emory and Henry
The Emory and Henry formation is an unusual American football formation that dates to the 1950s, where Emory & Henry College's football team used it. Instead of grouping all five ineligible players together, the Emory and Henry groups them, along with the two ends and two slotbacks, in three three-person groups: the center and the guards in the middle of the field, and an end, a tackle and a slotback near each sideline. In general, the formation is rare due to its inherent limitations: the tackles cannot receive forward passes or advance downfield despite their positioning (they can, however, receive lateral passes and participate in end-around plays), and it puts the tackles out of ideal blocking position, subjecting the quarterback to the defense's pass rush and effectively rendering the tackles of little use. The formation has seen limited usage in more recent years, including by coach Steve Spurrier. The formation can also be combined with other formations that feature a single running back and a quarterback in the backfield; one variant, the A-11, combines the Emory and Henry with the wildcat.

4–3 defense
This base defense consists of four defensive linemen, three linebackers, and four defensive backs (two safeties, two corners). Against two-receiver offensive sets, this formation is effective against the run and the pass. In the 4–3, the linemen tend to line up in the gaps between the offensive line. On passing downs, the Mike (middle linebacker) is often responsible to cover any running backs, the Sam (strong-side linebacker) covers the Tight End, and the Will (weak-side linebacker) either covers a back or blitzes in an attempt to sack the quarterback. This formation was invented by former Detroit Lions Head Coach Buster Ramsey. There are several different variations of the 4–3 defense such as the 4-3 under defense, 4-3 over defense, 4-3 umbrella defense, 4-3 swim defense, and 4-3 slide defense.

6–1 defense
The 6–1 defense basically has the personnel of the 4–3 defense, but instead of the outside linebackers playing behind the defensive line, they line up alongside of the defensive line. The middle linebacker is the only one directly behind the line.

3–4 defense
This is the base defense of some teams. It consists of three defensive linemen, four linebackers, and four defensive backs (two safeties, two corners). The advantage is that while 4 players still usually rush the line, the quarterback can be less sure of which of the 4 linebackers will join the 3 linemen. This formation sacrifices some size (of linemen) for speed (of linebackers), but coaches choosing to utilize this formation as their base defense typically choose larger players in the front 7 to make up for the shortage of size. In this formation, the single tackle usually lines up directly over the "nose" of the ball, and is often called the "nose guard". In this formation, the linemen often line up directly in front of the offensive line, while the linebackers "shoot the gaps". There is also a variation of this defense called the 3-4 under defense. This defense is a one gap version of the 3–4 defense.

2–5 defense
In this variation of the 3–4, known also as the "3–4 eagle", the nose guard is removed from play and in his place is an extra linebacker, who lines up on the line where the nose guard would be, sometimes slightly behind where the nose guard would be. It allows defenses more flexibility in man to man coverages and zone blitzes. It was created by Los Angeles Rams defensive coordinator Fritz Shurmur, and evolved from Buddy Ryan's 46 defense. Shurmur created the defense in part to take advantage of the pass rush abilities of Kevin Greene, a defensive end sized linebacker. The "eagle" in the formation's name comes from the late 1940s-early 1950s Philadelphia Eagles coached by Greasy Neale.

The original Eagle defense was 5–2 arrangement, with five defensive linemen and two linebackers. In Neale's defense, as in Shurmur's variation, the nose tackle could also drop into pass coverage, thus Shurmur's use of the Eagle defense name.

4–4 defense
The 4–4 defense consists of four defensive linemen, four linebackers, and three defensive backs (one safety, two corners). Puts "eight men in the box" to stop the run, but it sacrifices deep coverage against the pass, especially if the opponent's receivers are better athletes than the cornerbacks. The formation is popular in high school football as well as smaller collegiate teams. If the opposite team is a good passing team, outside linebackers are usually called on to defend slotbacks.

38 defense (split middle)
38 refers to the positions of the defensive players on the line of scrimmage. Two "3" techniques (DT, lined up outside eye of guards) and two "8" techniques (DE, lined up outside of end man on line of scrimmage). The DT's are the only down lineman. Two standup players (Monster and Rover) are in "5" techniques. Two Linebackers are 3 yards off the ball behind DT's. A combination of the 4–4, 6–2, and the 46. Designed to stop the run and to confuse offenses. 3 players in secondary all covering deep thirds. The confusing element is either the "5" techniques or the "8" techniques can rush or drop into the flats. LB's have hook zones. Each player on the line has a Two Gap responsibility.

46 defense (forty-six)
This formation was invented by Buddy Ryan, defensive coordinator of the Chicago Bears during the 1980s. Instead of having four linemen and six linebackers (as the name may suggest), it's actually a 4–4 set using 4–3 personnel. This was accomplished by moving a safety up into the "box" instead of a fourth linebacker. The '46' refers not to any lineman/linebacker orientation but was the jersey number of hard hitting strong safety Doug Plank, the player Buddy Ryan first used in this role at Chicago. The other feature of the 46 was the placement of both "outside" linebackers on the same side of the formation, with the defensive line shifted the opposite way with the weak defensive end about 1 to 2 yards outside the weak offensive tackle. This defense was the philosophical equivalent of the "Notre Dame Box" offense devised by Knute Rockne in the 1930s, in that it used an unbalanced field and complex pre-snap motion to confuse the opposing offense. Chicago rode this defense into a 15–1 season in 1985, culminating in a 46–10 win over New England in Super Bowl XX.

5–2 defense
The 5–2 defense consists of five defensive linemen, two linebackers, and four defensive backs (two corners, two safeties). Used to stop the run without sacrificing a safety. This formation is common in high schools..

Nickel formation
While the original Nickel defense utilized 5 defensive backs in conjunction with a 4 man rush, and but 2 linebackers, modern definition calls any formation that utilizes 5 defensive backs (from nickel = 5 cent piece) a Nickel defense. The Nickel defense originated as an innovation of Philadelphia Eagles defensive coach Jerry Williams in 1960 as a measure to defend star tight end Mike Ditka of the Chicago Bears. The Nickel coverage scheme is often used when the offense is using an additional wide receiver as it matches an extra cornerback against the extra receiver. The extra corner is often called a nickelback. Some variations use an extra strong safety instead of an extra cornerback. Strong safeties are often the more physical of the safeties, often resembling linebackers, so a Nickel with the extra safety can be more effective against the run than one wth an extra corner. The Nickel formation comes in several varieties:

The 4–2–5 removes a linebacker from the standard 4–3 to get the extra defensive back. A variation is the 2–4–5, which is primarily run by teams that run the 3–4 defense. They replace a defensive tackle with a corner.
 * 4–2–5 nickel defense

The 3–3–5 removes a lineman to the nickelback.
 * 3–3–5 nickel defense

The 33 stack uses an extra strong safety, and "stacks" linebackers and safeties directly behind the defensive linemen.
 * 33 stack

The 3–5–3 refers to a defense that has three down linemen (the "3" level), three linebackers and two corners (the "5" level), one free safety and 2 strong safeties (the "3" level). This is similar to a 33 stack, but with players more spread. Also called the "umbrella" defense or "3-deep". In this set, the third safety would be referred to as a "weak safety" (WS) and allows two position safeties at the mid-level with a third safety deep. It is because of this that the secondary safety in a football defense is called a free safety rather than a weak safety
 * 3–5–3

Dime formation


Any defense consisting of six defensive backs. The sixth defensive back is known as the dimeback and this defense is also used in passing situations (particularly when the offense is using four wide receivers). As the extra defensive back in the nickel formation is called the nickel, two nickels gives you a dime, hence the name of the formation.

Quarter and half-dollar formations (prevent defense)
Defense consisting of seven (quarter) or eight (half dollar) defensive backs. The seventh defensive back is often an extra safety, and this defense is used in extreme passing situations (such as to defend against a Hail Mary pass). It is occasionally referred to as the prevent defense because of its use in preventing desperation plays. The cornerbacks and safeties in a prevent defense usually make a point of defending the goal line at the expense of receivers in the middle of the field, thus making the formation susceptible to running plays and short passes.

The quarter formations are run from a 3–1–7 or a 4–0–7 in most instances; the New England Patriots have used an 0–4–7 in some instances with no down linemen. Half dollar defenses are almost always run from a 3–0–8 formation. The eighth defensive back in this case is usually a wide receiver from the offense. The wide receiver can capitalize on interception opportunities in the expected high-risk offensive play.

Unlike other formations, the extra safety is not referred to as a quarterback or halfback (except in Canadian football), to avoid confusion with the offensive positions of the same names, but rather simply as a defensive back or a safety.

Goal line defense
Defense used on the goal line or in short yardage situations where the entire defense lines up close to the line of scrimmage in an attempt to stop an expected running play. It is usually used to counter a Goal Line offense. Since there is not more than 10–11 yards of field left, the safeties can be pulled for more linemen or linebackers.

However, depending upon the abilities of a particular receiving corps, some defenses may be forced to keep their defensive backs in goal-line situations, weakening their ability to stop the run.

Other variants
Clearly, the permutations are endless, bound only by the individual and collective abilities of a defensive unit. More extreme formations may be called for when a coach feels that his team is at a particular disadvantage due to personnel matchups. For example, Eric Mangini, former coach of the Cleveland Browns and the former coach of the New York Jets, has employed a scheme that involves 1 defensive lineman and 6 linebackers. Prior to the snap, only the lineman assumes a three-point stance, ready to rush the passer. The 6 linebackers "rove" up and down the line of scrimmage, attempting to confuse the quarterback as to whether they will rush, drop into coverage, or blitz. This defense, combined with poor weather conditions, did serve to improve the Jets' pass rush against the New England Patriots offensive line. Patriots' quarterback Tom Brady was limited to just 14 completions out of 27 attempts, with no touchdowns and one interception during their December 16, 2007 game, but the defense proved ineffective in stopping the Patriots' running attack as the Patriots won.

Punting formation


Punting formations use a five-man offensive line, three "upbacks" (sometimes also referred to as "personal protectors") approximately 3 yards behind the line to act as an additional line of defense, two wide receivers known as "gunners" either to stop the punt returner or to down the ball and the punter, 15 yards behind the line of scrimmage to receive the long snap. The number of upbacks and gunners can vary, and either position can be replaced by a tight end in a "max protect" situation.

|                   |[][][][][]    [][][][][] |      FS            |             PK |   LB    LB    LB   |------ |CB  DEDTNTDTDE   CB| []   []   []   []   [] |--| []                 [] |   TELTLGLSRGRTTE   |   []              [] | UB             UB |      KR        KR |           PH       | |                   | |       PK           |


 * Above: ASCII art representations of the offensive kick (bottom left) against a generic kick defense formation (top left) Note the extremely tight spacing of the linemen. Top right: Kickoff formation, bottom right: kick return formation.

Field goal formation
Most field goals feature nine offensive linemen (seven on the line, both ends in the tight end position, with two extra slightly off the line of scrimmage), a place holder who kneels 7 yards behind the line of scrimmage, and a kicker.

Kickoff formation
Kickoff formations are usually in a straight line, with ten players (nine if a placeholder is used on the kickoff) lined up across the field several yards behind the ball. Many leagues require that at least four players be on each side of the kicker at the time of a kick; prior to this, an onside kick formation often had all ten of the other players on one side of the kicker. In 2011, the NFL instituted a rule requiring players other than the kicker to line up no more than 5 yards from the ball before the kick. The latter rule was instituted to prevent players from generating the speed expected from a 15-yard runup before the kick, thus potentially reducing the speed and impact of collisions down the field.

Kick return formation
Kick return formations vary; in most situations, an association football-like formation is used, with eleven players staggered throughout the field including two (rarely, one) kick returners back to field deep kicks, two more twenty yards ahead of them to field squib kicks, two more at about midfield mainly to assist in blocking, and five players located the minimum ten yards from the kicking line. In obvious onside kick formations, more players are moved to the front of the formation, usually top wide receivers and other players who are good at recovering and catching loose balls; this formation is known as the "hands team". A kick returner will usually remain back in the event of an unexpected deep kick in this situation.

To defend punts, the defensive line usually uses a man-on-man system with seven defensive linemen, two cornerbacks, a linebacker and a kick returner. They may choose to attempt to block the punt, or drop back to block the receiver.