NFL CMO Dr. Allen Sills explains importance of mandated guardian caps during training camp
What in the world are those weird-looking helmets the Saints are wearing in camp?, Rod Walker
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
Guardian Caps: What are they and why are NFL players wearing them? - Sactown Sports
NFL exec suggests Guardian Caps worn to protect players during practices could one day debut in games
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
Steelers Debut New Guardian Caps For Practice As Part Of New NFL Mandate - Steelers Depot
NFL Players Experiment With 'Guardian Caps' to Protect Heads – NBC Connecticut
Guardian Cap Debuts at NFL Training Camps League-wide