NFL kickoff will keep evolving - here's one wild alternative - ESPN
Kickoff Protection: Changes to Help Improve Safety
NFL bans running starts, restricts where players can line up on kickoffs - NBC Sports
NFL kickoffs: How will new rules change game in 2018 season?
Ivy League Football Saw Large Reduction in Concussions After New Kickoff Rules - The New York Times
NFL season is 50 days away – here are 50 things to look forward to
NFL kickoff rule changes should make the play safer, more exciting
Statistics show a narrow benefit to the NFL's new kickoff rule – Football Zebras
NFL Considering New 'Minor' Changes to Kickoff Ahead of 2018 Season, News, Scores, Highlights, Stats, and Rumors
New NFL Kickoff Rule: What Has the NFL Changed for Fair Catches and Touchbacks?
NFL Passes Controversial New Kickoff Rule - Daily Norseman