SI.com's Peter King writes letter of caution to NFL players

[GMDino]

(01-16-2016, 02:22 PM)rfaulk34 Wrote: I wouldn't be for outlawing all H2H because it would be impossible to do. Lowering your head and driving the crown of your helmet into any part of an opponent's body should be illegal on every square inch of a football field. 

Including RB's going through the line for a one yard TD?