This rule is going to make it really tough on the ball carriers. It's a tough rule to remember and adhere to. There are going to be a lot of bad calls surrounding this I bet. When a ball carrier tries to lower his head (instinct when a hit is coming) or lead with his shoulder, there will be a ton of instances where the refs INCORRECTLY interpret what they're seeing as leading with the head. Look how many complete B.S. calls we get with the "hit to the QB's head" rule.
Alfred Morris runs through every first tackler that gets to him...I really hope this stupid rule doesn't force him to change his running style.
No more Brandon Jacobs runs like this:
He made a career out of spearing people with the top of his helmet.