![]() ![]() By 1920, the grid system was abandoned in favor of the system of yard lines and hash marks used today. The ball would be snapped in the grid in which it was downed on the previous play. The two sports are also sometimes known as "gridiron football." The name originated with the sport's once-characteristic playing field: the original American football and Canadian football fields were marked by a series of parallel lines along both the width and length of the field, which produced a checkerboard pattern resembling a cross-hatched cooking gridiron. Various sources use the term "North American football" when discussing the American and Canadian games together, but this term is quite rare. The sport is typically known as simply "football" in the countries where it originated, regardless of the specific variety. In this period, lines were painted along the length of the field as well as the width, making a checkerboard pattern. The international governing body for the sport is the International Federation of American Football (IFAF) although the organization plays all of its international competitions under American rules, it uses a definition of the game that is broad enough that it includes Canadian football under its umbrella, and Football Canada (the governing body for Canadian football) is an IFAF member.Ī 1904 diagram of an American football field. Both varieties are distinguished from other football sports by their use of hard plastic helmets and shoulder pads, the forward pass, the system of downs, a number of unique rules and positions, measurement in customary units of yards (even in Canada, which largely metricated in the 1970s), and a distinctive brown leather ball in the shape of a prolate spheroid with pointed ends. American and Canadian football developed alongside (but independently from) each other and were originally more distinct before Canadian teams adopted features of the American game and vice versa. These sports originated in the 19th century out of older games related to modern rugby football, more specifically rugby union football. Football is played at professional, collegiate, high school, semi-professional, and amateur levels. Other derivative varieties include arena football, flag football and amateur games such as touch and street football. American football, which uses 11-player teams, is the form played in the United States and the best known form of gridiron football worldwide, while Canadian football, featuring 12-player teams, predominates in Canada. Gridiron football, also known as North American football or, in North America, simply football, is a family of football team sports primarily played in the United States and Canada. ![]() Diagram of a Canadian football field, wider and longer than the American field
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