Parity? Five N.F.L. Teams Remain Undefeated - The New York Times
Undefeated Teams: This Year's Big NFL Narrative
What is the best 8-8 team in NFL history? Why did they finish at.500? - Quora
Which 2-0 NFL Teams Should We Trust? - The Ringer
The Top 10 NFL Defenses of All Time, News, Scores, Highlights, Stats, and Rumors
Which NFL team is undefeated in the league's history?
NFL teams that came closest to going undefeated, joining the 1972 Dolphins as members of the perfect club
The Longest Winning and Losing Streaks in NFL History
The Longest Winning and Losing Streaks in NFL History