Ravens Embrace the Funny-Looking Guardian Helmets - Sports Illustrated Baltimore Ravens News, Analysis and More
If a player wanted to wear a Guardian Cap during a game, the league would prohibit it
Browns wearing Guardian Caps during training camp
What are those funny-looking soft caps on NFL helmets during camp?, Sports
Philadelphia Eagles Australian lineman Jordan Mailata blasts effectiveness of Guardian Caps, Fake news. It doesn't stop anything
NFL hopes to reduce head injuries with helmet experiment
NFL Introduces Guardian Caps At First Week Of Training Camp - The Sports Credential
Padded helmet cover shows little protection for football players - Scope
Guardian Caps Debut During NFL Minicamps
Why are some Titans players wearing Guardian Caps during training camp?, Titans
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
Guardian Caps Debut at Training Camps Across the NFL