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American football rules. Gameplay in American football consists of a series of downs, individual plays of short duration, outside of which the ball is or is not in play. These can be plays from scrimmage – passes, runs, punts or field goal attempts (from either a place kick or a drop kick) – or free kicks such as kickoffs and fair catch kicks.
American football (referred to simply as football in North America), also known as gridiron football, [nb 1] is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end. The offense, the team with possession of the oval-shaped football, attempts to advance down the field by running with the ball or ...
The history of American football can be traced to early versions of rugby football and association football.Both games have their origin in multiple varieties of football played in the United Kingdom in the mid-19th century, in which a football is kicked at a goal or kicked over a line, which in turn were based on the varieties of English public school football games descending from medieval ...
The vertical yellow bar is part of the goal post. A touchdown (abbreviated as TD [1]) is a scoring play in gridiron football. Scoring a touchdown grants the team that scored it 6 points. Whether running, passing, returning a kickoff or punt, or recovering a turnover, a team scores a touchdown by advancing the football into the opponent's end ...
American football positions. 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 on the field at one time and have "unlimited free substitutions", meaning that they may change any number of players during any ...
An illegal block or tackle using the legs to trip an opponent. line of scrimmage. One of six vertical planes parallel to the goal line when the ball is to be put in play by scrimmage. For each team in American football, the line of scrimmage is through the point of the ball closest to their end line.
American football is a form of gridiron football and the most popular sport in the United States. In the United States, the game is most often referred to as simply "football". Football is played in leagues of different size, age and quality, in all regions of the country. There is no single national governing body for American football in the ...
In American football, uniform numbers are displayed on both the front and back of the jersey, and in many cases the sleeves, shoulder pad, or occasionally helmets. The numbers on the front and back are very large, covering most of the jersey. Certain numbers may only be worn by players in specific positions, thus assisting the officials in ...