Funky-Looking Guardian Caps Rejected by NFL for Regulation Play
NFL expands rule against misuse of helmet; Guardian Caps required
If a player wanted to wear a Guardian Cap during a game, the
NFL says Guardian Caps reduced concussions by over 50
NFL Releases Concussion Data After Use of 'Guardian Caps' During
Puffy, spongy Guardian Caps could help curb NFL head injuries
FOOTBALL: NFL following Sequim's lead with protective caps
NFL Notes: Chargers-Saints Takeaways, New MNF Crew Debuts Tonight
Guardian Cap Use a Concern for Watt, Saleh Early in Training Camp
Guardian Caps: What are they and why are NFL players wearing them
The 2023 Uni Watch NFL Season Preview - by Paul Lukas