Defensive tackle

Adefensive tackle(DT) is a position inAmerican footballthat typically lines up on the line of scrimmage, opposite one of theoffensive guards;however, he may also line up opposite one of the offensivetackles.Defensive tackles are typically the largest and strongest of the defensive players. Depending on a team's defensive scheme, a defensive tackle may be called upon to fill several different roles. These may include merely holding the point of attack by refusing to be moved, or penetrating a certain gap between offensive linemen to break up a play in the opponent's backfield. If a defensive tackle reads a pass play, his primary responsibility is to pursue thequarterback,or simply knock the pass down at the line if it is within arm's reach. Other responsibilities of the defensive tackle may be to pursue thescreen passor drop into coverage in azone blitzscheme. In a traditional4–3 defense,there is no nose tackle. Instead there are a left and a right defensive tackle.Some teams, especially in theNational Football League(NFL), have a nose tackle in this scheme, but most of them do not.

Defensive tacklePat Williams(in blue) with theMinnesota Vikingsin 2009

Nose tackle

"Nose guard" redirects here. For the historical gridiron football nose protector, seeNose armor.For the medieval face protector, seeNasal helmet.

Nose tackle(alsonose guardormiddle guard) is a defensive alignment position for adefensive lineman.In the 3–4 defensive scheme the sole defensive tackle is referred to as the nose tackle.The nose tackle aligns across theline of scrimmagefrom the offense'scenterbefore the play begins in the "0-technique" position.In this position, frequently taking on the center and at least one if not both of the guards, the nose tackle is considered to be the most physically demanding position ingridiron football.In five-linemen situations, such as a goal-line formation, the nose tackle is the innermost lineman, flanked on either side by a defensive tackle ordefensive end.According toPat Kirwan,a traditional3–4 defensedemands "a massive man who can clog up the middle," while a4–3 defenseis looking for "a nose tackle who relies on quickness to penetrate and move along the front."

A lone nose tackle in a base3–4 defenseformation

Typical 3–4 nose tackles are "big wide bodies who can hold the point of attack and force double teams by theguardandcenter".They are usually the heaviest players on the roster, with weights ranging from 320 to 350 pounds (145 to 159 kg). Height is critical, as they are supposed to get "under" the offensive line; ideal 3–4 nose tackles are no taller than 6 ft 3 in (1.91 m).Recent examples of such nose tackles includeGilbert Brown,Jamal Williams,Vince Wilfork,andDamon Harrison.Rather uncommon are taller nose tackles, such asBobby Brown IIIwho is 6 ft 4 in (1.93 m), andTed WashingtonandMa'ake Kemoeatu,each of whom was 6 ft 5 in (1.96 m) tall and has won Super Bowl rings. Current notable examples of nose tackles includeDexter LawrenceandVita Vea.

In some4–3 defenses,the nose tackle is one of two defensive tackles. Some teams, especially in theNational Football League,have a nose tackle in the 4–3 defense, who lines up against the opposing center and very likely the weak-side or pulling guard. In a 4–3 defense, nose tackles are rather quick and supposed to "shoot the 'A gap' and beat the center and very likely the weak-side or pulling guard into the backfield."Height is not as important, and their weight is closer to 300 pounds (136 kg).

The terms "nose guard" or "middle guard" were more commonly used with the five-man defensive line of the older5–2 defense.Effective against most plays of the day, but with a weakness to the inside short pass, the 5–2 was phased out of the professional game in the late 1950s.In the4–3 defense,the uprightmiddle linebackerreplaced the middle guard. The nose tackle is also used in a 50 read defense. In this defense there is a nose tackle, two defensive tackles, and two outside linebackers who can play on the line of scrimmage or off the line of scrimmage in a two-point stance. The nose tackle lines up head up on the center about six to eighteen inches off the ball. In a reading 50 defense, the nose tackle's key is to read the offensive center to the ball. In run away, the nose tackle's job is to shed the blocker and pursue down the line of scrimmage, taking an angle of pursuit. The primary responsibility of the nose tackle in this scheme is to absorb multiple blockers so that other players in the defensive front can attack ball carriers and rush the quarterback.

3-technique tackle

A3-technique tackle(also3-tech) orundertackleis often featured in a formation with four defensive linemen (such as the traditional 4–3 or the 4–2–5Nickel defense), but can sometimes fill in as the nose tackle in a 3–4 defense. Compared to the 0 or 1-tech who is more similar to the nose tackle, the 3-tech is often a leaner, more agile defensive lineman (but still larger than thedefensive ends) who specializes in penetrating through the line with his quickness as his bigger counterpart occupies blockers, aiming to sack the quarterback or tackle the rusher (often the running back) for a loss of yards. The 3-tech often lines up against the "weak side" of the offensive line, and therefore faces fewer double-teams.Notable examples of prototypical 3-tech tackles in the NFL includeGeno Atkins,Sharrif Floyd,Tyrone Crawford,Kyle Williams,Ndamukong Suh,Aaron Donald,andEd Oliver.Donald and Oliver, in particular, have pushed the limits on how small a 3-tech can be, both weighing just 285 lbs.Their smaller statures have drawn criticism, but Donald and Oliver often make up for this using their athleticism. Donald has made tenPro Bowlsand was thrice named theAP Defensive Player of the Year.