Everything you need to know about the NFL's helmet guidelines and restrictions - Canal Street Chronicles
The NFL Is Considering A Drastic Rule Change That Would Change It's Iconic Image
NFL faces intense scrutiny over concussion protocols
Football Concussions Occur Mostly in Practice, Not Games
NFL approves alternate helmets beginning in 2022
NFL enforces helmet ban for Brady, 31 others - ESPN
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest
How a Robot Football Player Will Prevent Concussions - IEEE Spectrum
Helmets don't eliminate concussions. It's time for the NFL to ditch them, NFL
NFL hopes to reduce head injuries with helmet experiment - Seattle Sports
NYSportsJournalism.com - NFL Testing Approves First QB-Specific Helmet
Fueling the future of sports: How the NFL is using data to change the game–on the field, in the stands, and in your home
First QB helmet designed to help reduce concussions OK'd - TheGrio
Tracing the Evolution of Player Safety Throughout NFL History, News, Scores, Highlights, Stats, and Rumors
Paul Brown and the birth of the radio helmet in the NFL