Guardian Cap Debuts at Training Camps League-wide
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
Eagles players on Guardian Caps: 'We look a little goofy,' but all for safety
Guardian Caps: NFL's hotly debated new safety measure here to stay?
Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Guardian Cap Use a Concern for Watt, Saleh Early in Training Camp - Sports Illustrated
Could Guardian Caps be used in games? - NBC Sports
Chiefs News: Titans' overtime proposal due to the Chiefs-Bills finish - Arrowhead Pride
Seeking to reduce head contact, NFL mandates use of Guardian Cap helmet for early portion of training camp - ESPN
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer
NFL report: concussions dropped 50 PERCENT when players wore new 'Guardian Caps' over the summer