The NFL can't say or do enough in its avowed commitment to player safety — especially when it comes to saddling players like Clay Matthews with dubious roughing-the-passer infractions.

Yet then one watches Chiefs running back Kareem Hunt barreling through Broncos safety Justin Simmons in the first quarter Monday night for a 27-yard gain — and, make no mistake, Hunt lowered his head to make his upper body parallel to the ground while using the crown of his helmet as a battering ram — and ... no flag.

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Sigh.

Hunt finished with 175 yards from scrimmage and the game-winning touchdown in Kansas City's 27-23 come-from-behind win.

Verbatim from the NFL's new "Fact Sheet — Use of the Helmet" guidelines:

"The Rule: As approved by NFL clubs in March, it is a foul if a player lowers his head to initiate and make contact with his helmet against an opponent. Contact does not have to be to an opponent's head or neck area — lowering the head and initiating contact to an opponent's torso, hips, and lower body, is also a foul. Violations of the rule will be easier to see and officiate when they occur in open space — as opposed to close line play — but this rule applies anywhere on the field at any time.​

"Penalties for Violation: Loss of 15 yards. If the foul is by the defense, it is also an automatic first down. The player may also be ejected. Ejection standards:

►Player lowers his helmet to establish a linear body posture prior to initiating and making contact with the helmet

►Unobstructed path to his opponent

►Contact clearly avoidable and player delivering the blow had other options"

If Hunt's run wasn't a textbook violation under those new points of emphasis, then nothing is.

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Follow Nate Davis on Twitter @ByNateDavis