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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 ...
American football, referred to simply as football in the United States and Canada and 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 ...
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.
Other codes of football share a common history with American football. Canadian football is a form of the game that evolved parallel to American football, through its adoption of the Burnside rules in 1903. While both games share a common history and basic structure, there are some important differences between the two. [237]
In 1896 Walter Camp's the Official Football Guide was adopted by universities such as Cornell, Harvard, Penn, Princeton, and Yale as the official rule book. [89] The guides included an All-American football team list, football highlights, scores, and records for major universities; as well as rules with diagrams. [90]
The official playing field in Canadian football is larger than the American, and similar to American fields before 1912. The Canadian field of play is 110 by 65 yards (100.6 by 59.4 m), compared to 100 by 531⁄3 yards (91.4 by 48.8 m) in American football. Since 1986, Canadian end zones are 20 yards (18.3 m) deep while the American end zones ...
Gridiron football (/ ˈɡrɪdaɪ.ərn / 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. American football, which uses 11 players, is the form played in the United States and the best known form of gridiron ...
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.
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