Concussions Dropped More Than 50 Percent for Players Who Wore
Eagles players on Guardian Caps: 'We look a little goofy,' but all
Guardian Caps: Why some NFL players are wearing them in training camps
Guardian Caps leave some NFL players and coaches with concerns
Padded helmet cover shows little protection for football players
Get A Load Of These Big Dumb Helmet Helmets
NFL Executive VP: League Saw 52 Percent Decrease In Concussions At
What are the padded helmets players are wearing at NFL training camps?
Bombers set to don Guardian Caps” on helmets at training camp