3 worst rules in NFL history and how they impacted results
New NFL Kickoff Rule: What Has the NFL Changed for Fair Catches and Touchbacks?
Analysis: Several stars could miss start of NFL season over money squabbles
The NFL kick return, long endangered, may finally be extinct - The Washington Post
The most dangerous play in sports: Violent collisions cause rise in neck injuries on kickoff returns
Bears HC Matt Eberflus shares thoughts on NFL's new kickoff rule
Are NFL kickoff returners becoming obsolete?, NFL
NFL preseason could be a good test of how teams approach the league's new kickoff rule
NFL: Just get rid of the kickoff already
The NFL's rule tweaks are saving the kickoff from extinction - ESPN - NFL Nation- ESPN
Kickoff (gridiron football) - Wikipedia