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  2. Down (gridiron football) - Wikipedia

    en.wikipedia.org/wiki/Down_(gridiron_football)

    A down marker showing first down along the sideline of a collegiate game. A down in gridiron football is an attempt by the offensive team to run a play to advance the ball, while the defending team simultaneously attempts to halt their advance.

  3. 1st & Ten (graphics system) - Wikipedia

    en.wikipedia.org/wiki/1st_&_Ten_(graphics_system)

    The 1st and Ten line displays the yard line needed for a first down during an ESPN Sunday Night Football broadcast.. 1st & Ten is a computer system that augments televised coverage of American football by inserting graphical elements on the field of play as if they were physically present; the inserted element stays fixed within the coordinates of the playing field and obeys the visual rules ...

  4. Chain crew - Wikipedia

    en.wikipedia.org/wiki/Chain_crew

    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.

  5. NFL reportedly tested first-down tracking technology that ...

    www.aol.com/sports/nfls-reportedly-tested-first...

    NFL reportedly tested first-down tracking technology that could replace chain crews. Jason Owens. February 29, 2024 at 8:22 PM. ... Why does football still used the flawed, early-20th-century ...

  6. Dicker-rod - Wikipedia

    en.wikipedia.org/wiki/Dicker-rod

    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. The device was named for its inventor, George Dicker (1913–1989) [ 1 ] of Tustin, California , [ 2 ] and received a patent in 1973. [ 3 ]

  7. Did a down marker mistake cost Alabama a touchdown ... - AOL

    www.aol.com/sports/alabama-kicks-field-goal...

    However, the down marker on the side of the field didn’t change over from third down. That led Alabama to run a sneak to get the first down as Jalen Milroe easily got the yardage to the Ole Miss 11.