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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 free ...
A defensive tackle (DT) is a position in American football that typically lines up on the line of scrimmage, opposite one of the offensive guards; however, he may also line up opposite one of the offensive tackles. Defensive tackles are typically the largest and strongest of the defensive players. Depending on a team's defensive scheme, a ...
Free safety and strong safety positions in the 3–4 defense. Safety (S), historically known as a safetyman, is a position in gridiron football on the defense. The safeties are defensive backs who line up ten to fifteen yards from the line of scrimmage. There are two variations of the position: the free safety (FS) and the strong safety (SS).
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.
3–4 defense. In American football, the 3–4 defense is a common defensive alignment consisting of three down linemen and four linebackers. It is called a "base defense" because it will readily switch to other defensive alignments (such as a nickel defense or a dime defense) as circumstances change. Alternatively, some defenses use a 4–3 ...
The three basic defensive positions are: Defensive lineman (DL): Linemen play at the line of scrimmage, directly across from the offensive line. They are categorized as defensive tackles (DT) or defensive ends (DE). The 4-3 defense has 2 tackles and 2 ends; the 3-4 defense has 2 ends and 1 tackle, who is sometimes called a nose tackle (NT) to ...
In Canadian football, which has twelve players on the field compared to the eleven of American football, there is an additional position called defensive halfback, which plays like a hybrid between a linebacker and cornerback. Canadian formations include two cornerbacks, two halfbacks and one safety, for a total of five defensive backs.
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 ...