The N.F.L.'s New Tackling Rule: The Good, the Bad and the Confusing - The New York Times

In the N.F.L. and at Big Companies, Diversity Playbooks Face Hurdles - The New York Times

NFL controversies - Wikipedia

Have rule changes in football made the game worse by protecting quarterbacks instead of punishing them? - Quora

As Flags Fly, the N.F.L. Is Blasted for a 'Left-Wing' Tackling Policy - The New York Times

After a Decade of Explosive Scoring, NFL Defenses Are Back on Top - The New York Times

In the N.F.L. and at Big Companies, Diversity Playbooks Face Hurdles - The New York Times

Truth About Concussions, High School Football, CTE

October, 2015

NFL owners unanimously approve a rule that bans the hip-drop tackle

How the NFL's 'Catch Rule' Became the Worst Rule in Sports, News, Scores, Highlights, Stats, and Rumors