Article 3: Chop Block
A Chop Block is a block by the offense in which one offensive player (designated as A1 for purposes of this rule) blocks a defensive player in the area of the thigh or lower while another offensive player (A2)
engages that same defensive player above the waist.
Legal Chop Blocks.
A Chop Block is a legal block in the following situations on Running Plays.
(a)
A1 and A2, both offensive linemen, who are initially aligned adjacent to each another on the line of scrimmage, may chop a defensive player.
(b)
A1 and A2, both offensive linemen, who are initially aligned more than one position away from each other on the line of scrimmage, may chop a defensive player when the flow of the play is toward the block.
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A1 is lined up in the backfield at the snap and subsequently chops a defensive player engaged above the waist by A2, and such block occurs outside the area originally occupied by the tight end on either side