Guardian Caps', NFL's Most Recent Attempt At Preventing Head Injuries
Inside Training Camp: Everything Changes When the Pads Go On, News, Scores, Highlights, Stats, and Rumors
Guardian Cap: What are and why the NFL asks this safety measure in helmets
NFL Mandated Guardian Caps: Controversial Change - Sports Illustrated Seattle Seahawks News, Analysis and More
Cowboys seen wearing protective, NFL mandated Guardian Caps at OTAs
Why are NFL players wearing padding on helmets at training camp?
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Padded helmet cover shows little protection for football players - Scope
Steelers debut new, safer helmets for off-season training
Guardian Caps Guardian Sports
Arizona Cardinals defensive end J.J. Watt not fan of the new league-mandated Guardian Caps on helmets