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The chain gang. In gridiron football, the chain crew (commonly known as the "chain gang") is a crew that manages signal poles on one of the sidelines.There are three primary signal poles: the "rear rod" that marks the beginning of the current set of downs, the "forward rod" that marks the line to gain, and the "box" that marks the line of scrimmage.
A sideline official holding a dicker-rod during the 1974 World Football League season; running with the football is quarterback Dave Mays. The dicker-rod (also spelled dickerod) is a device intended to replace the first down chains commonly used to measure 10-yard distances during games of gridiron football.
Per the league, a tracking system is installed at every NFL stadium that includes "20-30 ultra-wide band receivers," "2-3 radio-frequency identification (RFID) tags installed into the players ...
In high school football, the clock starts on the snap the entire game. A loose ball is out of bounds. The clock is restarted when a ball is returned to the field in the NFL. In NFHS and NCAA rules, this is the same as when the ball is carried out of bounds, although under NCAA rules, the clock starts [when?] after a forward fumble the entire game.
Diagram of a modern American football field. Diagram of an early 20th century version of an American football field. The rectangular field of play used for American football games measures 100 yards (91.44 m) long between the goal lines, and 160 feet (48.8 m) (53.3 yards) wide. The field may be made of grass or artificial turf. In addition ...
A chain official was carted off the field on Sunday night during the Bears-Texans game, too. ... stepped back as Texans running back Joe Mixon ran toward the sidelines in the game and he tripped ...
Underdog Boise State took a 28-10 lead over one of college football's blue bloods that was followed by a 25-point Sooners run capped by what could have been a back-breaking interception return for a touchdown with 1:02 left. Then the Broncos used three trick plays that remain sensations to not only force overtime but win 43-42.
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