Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL using helmet caps for player safety, research – News-Herald
Certain NFL players must wear Guardian Caps through second preseason game
Guardian Caps: Why some NFL players are wearing them in training camps
Coverage of the NFL in Guardian Caps
Quarterback-specific helmet to be available during 2023 NFL season
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
NFL Players Experiment With 'Guardian Caps' to Protect Heads – NBC Connecticut
NFL hopes to reduce head injuries with helmet experiment
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games