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| Call a Play |
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Instruct players to execute a pre-planned play.
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| Clipping |
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Blocking an opponent below the waist from behind; this illegal block is a personal foul, punishable by a 15-yard penalty.
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| Complete Pass |
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A forward pass to a teammate who catches it in the air.
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| Conferences |
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Groups into which teams are divided in professional and college football; the NFL is divided into National and American Conferences.
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| Controlling the Game Clock |
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The use of tactics by an offensive team to either save or use up time on the game clock, which often dictates its choice of plays.
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| Cornerback or Safety Blitz |
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A blitz package in which the corners or safetys, instead of covering the receivers, rush the quarterback.
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| Cover or Coverage |
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Preventing a player from gaining yards; in pass coverage, a defender follows a receiver to prevent him from catching a pass; in kick coverage, members of the kicking team try to prevent a long kick return.
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| Crossing Route |
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When a receiver delays a moment at the line and then runs over the middle across the field.
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| Cut Back |
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A sudden change in direction taken by a to make it more difficult for defenders to follow and tackle him.
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