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Gridiron football (/ ˈ ɡ r ɪ d aɪ. ər n / GRID-eye-ərn), [1] also known as North American football, [2] or in North America as simply football, is a family of football team sports primarily played in the United States and Canada.
A football field as seen from behind one end zone. The tall, yellow goal posts mark where the ball must pass for a successful field goal or extra point. The large, rectangular area marked with the team name is the end zone. Football games are played on a rectangular field that measures 120 yards (110 m) long and 53 + 1 ⁄ 3 yards (48.
See also Gridiron football The word derives from the same root as griddle, meaning a "lattice". The original field was marked in a grid of crisscrossed lines; the ball would be snapped in the grid in which it was downed on the previous play. In modern usage, a gridiron is a surface with parallel lines.
A down in gridiron football is an attempt by the offensive team to run a play to advance the ball, while the defending team simultaneously attempts to halt their advance. The down is a distinguishing characteristic of the game compared to other codes of football, but is synonymous with the 6 "tackle" rule in rugby league.
A standard football game consists of four 15-minute quarters (12-minute quarters in high-school football and often shorter at lower levels, usually one minute per grade [e.g. 9-minute quarters for freshman games]), [6] with a 12-minute half-time intermission (30 minutes in the Super Bowl) after the second quarter in the NFL (college halftimes are 20 minutes; in high school the interval is 15 ...
Jason Kelce (No. 62) prepares to snap the football to Philadelphia Eagles quarterback Carson Wentz in a 2017 game. 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.
In gridiron football, there are several different rulings for encroachment: . In the NFL, encroachment occurs when, before the snap, a defensive player illegally crosses the line of scrimmage and makes contact with an opponent or has a clear path to the quarterback.
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 .