Undefeated in the playoffs vs a perfect season
The two are not the same. Winning all your playoff games is the price of any championship — dozens of teams have done it. Winning every game a season has, start to finish, is the perfect season, and it is one of the hardest things in sports. In the modern NFL that full run reads 20-0: seventeen regular-season wins and three in the playoffs, with no loss anywhere. Read what 20-0 means in football for the math.
The teams that ran the table — until they didn’t
Plenty of teams carried an unbeaten record into January and then lost the one game that mattered. The 2007 New England Patriots went 16-0, reached 18-0, and lost the Super Bowl to finish 18-1. Long before that, the 1934 Bears went 13-0 and the 1942 Bears went 11-0 in the regular season, only to lose the NFL Championship Game. Each proves the same point: the playoff run is where perfect seasons go to die.
Only one got through
The 1972 Dolphins are the only NFL team to go undefeated through the regular season and the playoffs to a championship — 14-0, then three playoff wins, then Super Bowl VII, a clean 17-0. That is why a perfect postseason on top of a perfect regular season is the sport’s rarest feat: it has one owner in more than a hundred years of football.
Try to run the whole table
The game here puts you in that seat. Draft an all-time roster from real franchise history, simulate the whole season, and see whether your team can win every game — regular season and playoffs — for a perfect 20-0. Build an undefeated NFL team, play the cross-sport perfect season game, or read how to build a perfect roster. One loss and the run ends in the playoffs — same as it does in real life.