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In gridiron football, a lineman is a player who specializes in play at the line of scrimmage. The linemen of the team currently in possession of the ball are the offensive line, while linemen on the opposing team are the defensive line. A number of NFL rules specifically address restrictions and requirements for the offensive line, whose job is ...
Two rows of short lines, known as inbounds lines or hash marks, run at 1-yard (91.4 cm) intervals perpendicular to the sidelines near the middle of the field. All plays start with the ball on or between the hash marks. Because of the arrangement of the lines, the field is occasionally referred to as a gridiron.
Official (gridiron football) Field judge Brad Freeman (88) and line judge Jeff Seeman (45) at an NFL game in October 2014. In gridiron football, an official is a person who has responsibility in enforcing the rules and maintaining the order of the game. During professional and most college football games, seven officials operate on the field.
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 ...
Gridiron football (/ ˈɡrɪdaɪ.ərn / GRID-eye-ərn), [1] also known as North American football (French: football Nord-Américain), [2] or in North America as simply football, is a family of football team sports primarily played in the United States and Canada. American football, which uses 11 players, is the form played in the United States ...
Center (gridiron football) Center or centre (C) is a position in American football. The center is the innermost lineman of the offensive line on a football team's offense who passes (or "snaps") the ball between his legs to the quarterback at the start of each play. During the period of the one-platoon system, centers frequently played ...
Linebacker (LB) is a playing position in gridiron football. Linebackers are members of the defensive team, and typically line up three to five yards behind the line of scrimmage and the defensive linemen, playing closer to the line of scrimmage than the defensive backs (secondary). As such, linebackers play a hybrid role and are often the most ...
Traditionally, defensive ends are in a three-point stance, with their free hand cocked back ready to "punch" an offensive lineman, or in a two-point stance like a strong safety so they can keep containment. Some defensive ends play the position due to their size; they close down their gap so the running back has no hole to run through.
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