What is an illegal block? FindAnyAnswer.comWhat is a crackback?
The "peel-back block" which ended Brian Cushing's season in 2012 is now illegal, as owners voted to modify the rule book on Tuesday.
The use of "peel-back" blocks was banned by the NFL on Tuesday in order to help defend players.
It is now illegal to block with a "peel-back" block going forward.After the game, he said that he hoped the league would ban that type of block.
If the blocker is moving toward his own end line and the player is aligned in the tackle box, he cannot initiate contact on the side and below the waist.
"If the near shoulder of the blocker contacts the front of his opponent's body, the peel back block is legal," the rule states.