Jags adjust to new helmet rule
Football Helmet Testing, Technology and Safety Research
NFL helmet rule hits on confusion
Bengals Asking NFL to Change Alternate Helmet Use Rules
Sports Illustrated Monday Morning Quarterback: A Fully Caffeinated Guide to Everything You Need to Know About the NFL: King, Peter: 9781603208680: : Books
NFL's new helmet rules will make for a lot of bad calls
NFL allowing players to wear lightly tinted Oakley helmet visors - Sports Illustrated
Sports take: New NFL rules help protect the players but also ruin the game
Helmet Innovation: More and Better Choices, Fewer Concussions
NFL owners adopt new rules for kickoffs - The Boston Globe
Falcons to face Saints, 2 other teams while wearing red helmets - The Falcoholic
Guardian Cap: What are and why the NFL asks this safety measure in helmets
Detroit-Made Xenith Football Helmets Deemed Safest By The NFL - CBS Detroit