The N.F.L. Struggles to Tackle Its Latest Problem: Tackling - The New York Times
NFL officiating video stresses new crown of the helmet rule - NBC Sports
First QB helmet designed to help reduce concussions approved
For Various Reasons, N.F.L. Players Do Not Wear Cups - The New York Times
SAFR Helmet Covers – SAFR Sports
Everything you need to know about the NFL's helmet guidelines and restrictions - Canal Street Chronicles
Michigan football debuts new helmet stickers telling a player's story
A football helmet designed just for linemen arrives. Now will it catch on? - The Athletic
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL to test new position-specific helmet designed for pros - The Boston Globe
NFL to test new position-specific helmet designed for linemen
NFL to test new position-specific helmet designed for pros - Sentinel Colorado
New NFL Helmet Cuts Quarterback Concussion Risk—But Only 7% Better Than Older Models