NFL announces more steps to reduce head injuries
NFL Says Regular Season Concussions Rose 18%
NFL says Guardian Caps reduced concussions by over 50%
EXPLAINER: NFL using helmet caps for player safety, research
NFL hopes to reduce head injuries with helmet experiment
FOOTBALL: NFL following Sequim's lead with protective caps
New Football Helmet Could Save the Sport
NFL hopes to reduce head injuries with helmet experiment - Sports
NFL expands rule against misuse of helmet; Guardian Caps required in regular season, postseason
Certain NFL players must wear Guardian Caps through second preseason game
Shell game: Player safety looming concern as new season approaches, Local Sports
Guardian Caps a fit for Park Wolfpack - Cottage Grove Journal