September 2013 – The Concussion Blog
Daily Slop - 22 Aug 23: Ravens are now the most recent NFL team to lose a preseason game; Washington at 2-0
Guardian Caps Guardian Sports
Get A Load Of These Big Dumb Helmet Helmets
Players, coaches react to mandatory use of Guardian Caps
Football helmet - Wikipedia
What are Guardian Caps? NFL's latest padded helmets for added safety
Guardian Caps - Are the soft-shelled football helmet covers effective at limiting head injuries? - ESPN
NFL hopes to reduce head injuries with helmet experiment
NFL executive hints that Guardian Caps could eventually be worn in games, along with position-specific helmets
Guardian Caps leave some NFL players and coaches with concerns: 'You feel like a bobblehead'
Guardian Cap Debuts at Training Camps League-wide