- published: 18 Apr 2014
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Gridiron football, sometimes known as North American football, is an umbrella term for related codes of football primarily played in the United States and Canada. The predominant forms of gridiron football are American football and Canadian football. The terms refer to the sport's characteristic playing field, which is marked with a series of parallel lines resembling a gridiron.
"Gridiron" football developed in the late 19th century out of the older games related to the games now known as rugby football and association football. It is distinguished from other football codes by its use of helmets and shoulder pads, the forward pass, the system of downs, a line of scrimmage, more specialist positions and formations, free substitution, platooning—the use of different players for offense and defense, measurements in yards, and the ability to score points while not in possession of the ball by way of the safety. Walter Camp is credited with creating many of the rules that differentiate gridiron football from its older counterparts.
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