NFL takes first-ever step to ban some helmets after testing - The San Diego Union-Tribune
NFL helmet manufacturers hope to reduce concussions, save game - Washington Times
NFL, NFLPA announce ban of 10 helmet models after laboratory study
Antonio Brown reportedly says he'd retire over helmet: Here's why it's now banned by the NFL
The NFL and NFLPA ban 10 helmet models over safety concerns
NFL, NFLPA Ban 10 Helmet Models From Game Use
NFL, NFLPA ban 10 helmet models
What are Guardian Caps? NFL's latest padded helmets for added safety
NFL, NFLPA ban 10 helmet models after testing
Tom Brady Among 32 Players Whose 2018 Helmet Types Banned by NFL for 2019 Season, News, Scores, Highlights, Stats, and Rumors