NFL mandates use of Guardian Caps for training camp in 2022 - Cincy Jungle
Guardian Caps Debut at Training Camps Across the NFL
NFL Makes Ruling On Players Wearing Guardian Cap During Game - The Spun: What's Trending In The Sports World Today
EXPLAINER: NFL using helmet caps for player safety, research
Utah Utes football adds new concussion-reducing helmets for fall camp
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
Guardian Caps: Why some NFL players are wearing them in training camps
Raiders, other NFL teams wear Guardian Caps for head safety, Raiders News
Coverage of the NFL in Guardian Caps
Bellmore-Merrick athletics debuts new guardian caps, Herald Community Newspapers
Arizona Cardinals defensive end J.J. Watt not fan of the new league-mandated Guardian Caps on helmets