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					Originally Posted by Kirby
					
				 
				Yes, I believe it is considered a sack.  I do not believe "sack" is a rule book term, so that is why you will not find it in the rules.  "Sack" is more of a statistical term. 
			
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 The term was not widespread before 1970, and then in the early '70s suddenly broke out as common football slang.