KEY (American Football)

What is KEY (American Football)?

KEY (American Football) meaning noun: opposing player whose movement is observed in order to make a decision about how to play against his team; generally, all defenders key on designated offensive players related to their defensive responsibilities; also two defenders are the dive key and pitch key for the quarterback when he runs a triple-option play; verb: use of an opposing player’s movement to make a decision

 

reference: John T. Reed: DICTIONARY OF AMERICAN FOOTBALL TERMS