Here are images of the popular sport, American football referred to as football in the United States and Canada.
American football playing rules
American football referred to as football in the United States and Canada and also known as gridiron, is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end.
The offense, which is the team controlling the oval-shaped football, attempts to advance down the field by running with or passing the ball, while the defense, which is the team without control of the ball, aims to stop the offense’s advance and aims to take control of the ball for themselves. The offense must advance at least ten yards in four downs or plays, and otherwise, they turn over the football to the defense. If the offense succeeds in advancing ten yards or more, they are given a new set of four downs. Points are primarily scored by advancing the ball into the opposing team’s end zone for a touchdown or kicking the ball through the opponent’s goalposts for a field goal. The team with the most points at the end of a game wins.
American football history
American football in the United States developed from the sports of association football and rugby football. The first match of American football was played in 1869, between two college teams, Rutgers and Princeton. During the latter half of the 1870s, colleges playing association football switched to the Rugby Union code, which allowed carrying the ball. The rules changes from 1880 onward by Walter Camp, the “Father of American Football“, established the snap, eleven-player teams, and the concept of downs. Later rule changes legalized the forward pass, created the neutral zone, and specified the size and shape of the football. The sport is closely related to Canadian football, which evolved parallel to the American football.
American football is the most popular sport in the United States. As of 2012, nearly 1.1 million high school athletes and 70,000 college athletes play the sport in the United States annually, mostly man. The National Football League has the highest average attendance of any professional sports league in the world. The championship game, the Super Bowl, ranks among the most-watched club sporting events in the world, and the league has an annual revenue of around US$10 billion.
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