Oh boy, the NFL may have just changed everything. Shortly after fixing their broken catch rule, the league passed a separate rule today that makes all helmet to helmet contact illegal with the possibility of ejection. Here’s the official word from NFL PR Man Brian McCarthy.
Playing Rule Article 8: It is a foul if a player lowers his head to initiate and make contact with his helmet against an opponent. The player may be disqualified. Applies to any player anywhere on the field. The player may be disqualified.
— Brian McCarthy (@NFLprguy) March 27, 2018
More on the rule change.