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USA Football

Roles

Glossary

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Does a rule or game term have you stumped? Look no further. We have the answers.

  • chain
    ten-yard length of chain used to measure the distance required for a first down.
  • cross block
    a block in which two linemen block defenders who are diagonally opposite the blockers’ own starting positions; one of the blockers, usually the outside blocker, goes in front.