The NFL's rule tweaks are saving the kickoff from extinction - ESPN - NFL Nation- ESPN
NFL considering 4th and 15 play as onside kicks alternative
Goodell sees more discussion coming on fourth-and-15 alternative to onside kick : r/nfl
NFL needs to get rid of artificial turf, not kickoff returns
NFL rule change proposals aim to modify overtime rules, jersey numbers - Pats Pulpit
NFL owners approve rule changes, including no preseason overtime and expanded jersey number options, NFL News
Tom Oates: Rift between Aaron Rodgers and Packers was set in motion with pick of Jordan Love
Drastic changes coming to the kickoff – Football Zebras
Safety At Forefront, Overtime Not Up For Change At Owners' Meeting
Broncos suggest onside kick replacement, Chiefs propose NFL OT changes - Sports Illustrated