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  2. Play calling system - Wikipedia

    en.wikipedia.org/wiki/Play_calling_system

    Play calling system. A play calling system in American football is the specific language and methods used to call offensive plays . It is distinct from the play calling philosophy, which is concerned with overall strategy: whether a team favors passing or running, whether a team seeks to speed up or slow down play, what part of the field passes ...

  3. Assistant referee (association football) - Wikipedia

    en.wikipedia.org/wiki/Assistant_referee...

    Assistant referee signalling that an offside offence has occurred. In association football, an assistant referee (previously known as a linesman) is an official who assists the referee in administering the Laws of the Game during a match. Although assistants are not required under the Laws, at most organised levels of football the match ...

  4. Lineman (gridiron football) - Wikipedia

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

    In gridiron football, a lineman is a player who specializes in play at the line of scrimmage. The linemen of the team currently in possession of the ball are the offensive line, while linemen on the opposing team are the defensive line. A number of NFL rules specifically address restrictions and requirements for the offensive line, whose job is ...

  5. Fair catch - Wikipedia

    en.wikipedia.org/wiki/Fair_catch

    Fair catch. A fair catch is a feature of American football and several other codes of football, in which a player attempting to catch a ball kicked by the opposing team – either on a kickoff or punt – is entitled to catch the ball without interference from any member of the kicking team. [1] A player, usually a return specialist, wishing to ...

  6. American football positions - Wikipedia

    en.wikipedia.org/wiki/American_football_positions

    American football positions. In American football, the specific role that a player takes on the field is referred to as their "position". Under the modern rules of American football, both teams are allowed 11 players on the field at one time and have "unlimited free substitutions", meaning that they may change any number of players during any ...

  7. Glossary of association football terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_association...

    Glossary of association football terms. A player doing a keepie-uppie. Association football (more commonly known as football or soccer) was first codified in 1863 in England, although games that involved the kicking of a ball were evident considerably earlier. [1] A large number of football-related terms have since emerged to describe various ...

  8. Offensive coordinator - Wikipedia

    en.wikipedia.org/wiki/Offensive_coordinator

    Offensive coordinator. An offensive coordinator is a member of the coaching staff of an American football or Canadian football team who is in charge of the team's offense. Generally, along with the defensive coordinator and the special teams coordinator, this coach represents the second level of coaching structure after the head coach .

  9. Tight end - Wikipedia

    en.wikipedia.org/wiki/Tight_end

    The tight end ( TE) is an offensive position in American football, arena football, and Canadian football. It is a hybrid that combines the characteristics and roles of both an offensive lineman and a receiver. As part of the receiver corps, they play inside the flanks (tight), contrasted with the split end who plays outside the flanks (wide). Like offensive linemen, they are usually lined up ...