NFL already aiming for future 18-game schedule, perhaps as early as 2025, per reports
2022 NFL season: Predicting every game, all 32 team records - Sports Illustrated
What you need to know about enhanced NFL schedule featuring 17 regular-season games per team
NFL Season to Feature 17 Regular Season Games Per Team
How the NFL could implement an 18-game regular season, other changes
College Football Playoff - Wikipedia
NFL's 17-game season is too long
League of Denial: The NFL, Concussions, and the Battle for Truth: 9780770437565: Fainaru-Wada, Mark, Fainaru, Steve: Books
New York Jets: 17th Game Added to 2021 Schedule
NFL expands regular season to 17 games starting in 2021