Seeking to reduce head contact, NFL mandates use of Guardian Cap
What are Guardian Caps? NFL's latest padded helmets for added safety
Puffy, spongy Guardian Caps could help curb NFL head injuries
EXPLAINER: NFL using helmet caps for player safety, research
NFL exec suggests Guardian Caps worn to protect players during
NFL hopes to reduce head injuries with helmet experiment
Guardian Cap: What are and why the NFL asks this safety measure in
Guardian Cap Debuts at Training Camps League-wide
NFL players wear Guardian Caps to reduce head trauma during
NFL says positions wearing Guardian Caps saw 52% decrease in