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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 ...
NFL back judge Lee Dyer retrieves a penalty flag on the field during a game on November 16, 2008 between the San Francisco 49ers and St. Louis Rams.. In gridiron football, a penalty is a sanction assessed against a team for a violation of the rules, called a foul. [1]
Nine-man football, eight-man football and six-man football are varieties of gridiron football played with fewer players. They are played with the same number of downs (often with a 15-yard [14 m] requirement for a new set of downs, as opposed to 10 in other codes), fewer offensive linemen , and an 80-yard (73 m) field.
Tight end Andrew Quarless (81) in motion. In gridiron football, motion refers to the movement of an offensive player at the time of the snap.. While there are different rules regarding motion, most mandate that no more than one player may be in motion at the time of the snap, [1] and the player must not be an offensive lineman (typically, the player in motion is a wide receiver or running back ...
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.
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.
The term "football" was officially established in the rulebook for the 1876 college football season, when the sport first shifted from soccer-style rules to rugby-style rules. Although it could easily have been called "rugby" at this point, Harvard, one of the primary proponents of the rugby-style game, compromised and did not request the name ...
Additionally, the offensive team may be charged with the penalty of a "false start" if a player on the offense jumps or moves abruptly, simulating the start of the play. This movement is not normally considered a subset of the "motion" or "shift" rules, as the player is not judged to be moving into a new pre-snap position; they are merely ...