Smith] NFL says positions wearing Guardian Caps saw 52% decrease in concussions : r/nfl
These puffy helmet caps are the next big thing in NFL player safety, National Sports
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NFL hopes to reduce head injuries with helmet experiment
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NFL hopes to reduce head injuries with helmet experiment
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When an NFL lineman puts on his first guardian cap…. Better get out of the way 😂 : r/nflmemes
Guardian Caps: NFL requires use of helmet cover at training camps to reduce head injuries : r/nfl
NFL hopes to reduce head injuries with helmet experiment
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NFL hopes to reduce head injuries with helmet experiment