Funky-Looking Guardian Caps Rejected by NFL for Regulation Play, OK'd for Practice - Core77
If a player wanted to wear a Guardian Cap during a game, the league would prohibit it - NBC Sports
Guardian Caps Guardian Sports
UGA Bulldogs not going to wear all-white uniforms: source
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Guardian Caps (@guardian_caps) • Instagram photos and videos
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UGA football outfits players in Guardian Caps to try to reduce impacts.
NFL hopes to reduce head injuries with helmet experiment
Guardian Caps (@guardian_caps) • Instagram photos and videos
Ohio State Aiming To Reduce Head Injuries With Guardian Caps - Sports Illustrated Ohio State Buckeyes News, Analysis and More
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More colleges join NFL study that uses mouthguard sensors to track head impacts
NFL hopes to reduce head injuries with helmet experiment