Defensive back
Encyclopedia
In American football
American football
American football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...

 and Canadian football
Canadian football
Canadian football is a form of gridiron football played exclusively in Canada in which two teams of 12 players each compete for territorial control of a field of play long and wide attempting to advance a pointed prolate spheroid ball into the opposing team's scoring area...

, defensive backs (DBs) are the players on the defensive team who take positions somewhat back from the line of scrimmage; they are distinguished from the defensive line players and linebackers, who take positions directly behind or close to the line of scrimmage.

The defensive backs, in turn, generally are classified into several different specialized positions:
  • Safety
  • Cornerback
    Cornerback
    A cornerback is a member of the defensive backfield or secondary in American and Canadian football. Cornerbacks cover receivers, to defend against pass offenses and make tackles. Other members of the defensive backfield include the safeties and occasionally linebackers. The cornerback position...

    , which include
    • nickel back, the fifth defensive back in some sets
    • dime back
      Dimeback
      In American football, a dimeback is a cornerback who serves as the sixth defensive back on defense. The third cornerback on defense is known as a nickelback. The dimeback position is essentially relegated to backup cornerbacks who do not play starting cornerback positions...

      , the sixth defensive back in some sets
    • The seventh defensive back, in the exceedingly rare 'quarter' set
      • known as a dollar back or a quarter back (not to be confused with the offensive player who throws the ball)

The group of defensive backs is known collectively as the secondary. They most often defend the wide receiver corps; however, at times they may also line up against a tight end or a split out running back. They are usually the smallest, quickest players on the field.

See also

  • American football positions
    American football positions
    In American football, each team has eleven players on the field at one time. Because the rules allow unlimited substitution between plays, the types of players on the field for each team differ depending on the situation...

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