Helmet safety rule - a loophole for teams losing at the end? - Tomahawk Nation
The NFL Breaks the One-Helmet Rule – Green Gridiron, Inc.
NFL Safety Tech, Part One: The Data Behind the Helmet Rule
NFL Rule Change Now Makes Head To Head Contact Illegal - Steelers Depot
NFL nearing end to one-helmet rule? - The Falcoholic
High School Football Rule Changes Emphasize Helmet-To-Helmet Ban | MomsTeam
NFL's new, stricter helmet rule noble in spirit, futile in practice - The San Diego Union-Tribune
Explaining Antonio Brown's helmet issue: What are the NFL's rules, Raiders' options, AB's contract? | Sporting News
The NFL is scrapping its stupid alternate-helmet rule so here are nine glorious throwback lids we need to see pronto | This is the Loop | GolfDigest.com
NFL helmet lower rule: Explanation of new regulations - Sports Illustrated
New NFL rules: Crown-of-helmet change to help runner, defender
NCAA clarifies targeting rule, helmet hits and the role of replay officials - Los Angeles Times
Bucs can soon begin wearing their throwbacks - Bucs Nation
Report: NFL Changes Lowering-of-Helmet Rule After Having Trouble Fining Players | News, Scores, Highlights, Stats, and Rumors | Bleacher Report