Quote:
	
	
		
			
				Originally posted by Forksref  
I didn't give a Tinker's Damn about a Tinker's Damn until today.  I learned something. 
 
As long as the block is above the waist and not from behind (side is legal) the block is legal.  Crackback is not a term used by officials in NF.  In NCAA, blocks may be below the waist except in change of possession plays and if the block is from a player moving toward the snap. 
			
		 | 
	
	
 We use it all the time.  We remind each other to watch for crackbacks that are illegal blocks.