Guardian Caps: What are they and why are NFL players wearing them? - Sactown Sports
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
NFL Releases Concussion Data After Use of 'Guardian Caps' During Offseason - Sports Illustrated
EXPLAINER: NFL using helmet caps for player safety, research
NFL 2023 Season Guardian Caps Mandate Supported By 52% Concussion Drop – Sports Techie
Puffy, spongy Guardian Caps could help curb NFL head injuries - The Washington Post
NFL offseason priorities for 2023: Possible rules changes, safety reforms - ESPN
NFL players wear Guardian Caps to reduce head trauma during training camp
Coverage of the NFL in Guardian Caps
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
NFL 2023 Season Guardian Caps Mandate Supported By 52% Concussion Drop – Sports Techie
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
NFL's use of Guardian padded helmet caps in camp draws support and skepticism - The Athletic
Transcript, Player Health and Safety Preseason Media Briefing, August 16, 2023