Undefeated Before the 16-Game Era

The story of the perfect season didn’t begin with the 1972 Dolphins. Decades earlier, in a rougher, shorter version of pro football, teams ran through entire regular seasons unbeaten — and learned the same hard lesson that would haunt the modern game: the last game is the one that breaks you.

When “undefeated” meant something different

In the early NFL the season was short — a dozen games or fewer — and ties were common, because overtime didn’t exist. Champions were often decided by record rather than a single title game, and the schedule looked nothing like the modern sixteen or seventeen weeks. A perfect regular season was still possible; it was just measured on a smaller canvas.

Two Chicago Bears teams got there and remain the definitive early near-misses.

The 1934 Bears and the Sneakers Game

The 1934 Bears went 13-0 in the regular season, extending a winning streak that stretched back into the prior year, and entered the NFL Championship Game as heavy favorites over the New York Giants. Then the weather intervened. Freezing rain turned the Polo Grounds field to ice, and for a half the footing neutralized Chicago’s superior team.

At halftime the Giants changed into basketball sneakers for better traction on the frozen ground. It worked. New York scored 27 points in the fourth quarter and won 30-13, in a game forever remembered as the “Sneakers Game.” A 13-0 team lost the only game that could have made the season perfect — beaten as much by the ice as by the Giants.

The 1942 Bears and a stunning upset

Eight years later the Bears did it again, going 11-0 in the regular season and rolling toward a title as one of the most dominant teams of the decade. They were installed as enormous favorites over the Washington Redskins in the NFL Championship Game — in part because Chicago had annihilated Washington 73-0 in the 1940 title game, still the most lopsided result in league history.

Washington got its revenge. The Redskins won 14-6, handing the 11-0 Bears their only loss of the year in the game that mattered most. Perfect through the regular season, and then upset when a championship was one win away.

The pattern that never changed

Look closely and the early NFL was telling the same story it would tell in 2007. A team can be the best in football, win every game on the schedule, and still run into a single afternoon — an icy field, a motivated underdog — that a perfect season cannot survive. The 1934 and 1942 Bears were the 2007 Patriots of their era: flawless right up until the last game.

It’s why the only truly perfect season, the 1972 Dolphins’ 17-0, stands so far apart. Plenty of teams have gone unbeaten into the final game. Almost none have walked out of it that way.

Where they fit

These pre-modern Bears teams are the deep roots of this whole subject — the earliest proof that a perfect regular season and a perfect season are two very different things. For the era when the schedule finally reached sixteen games, read the 16-game era, explained. For the one team that finished everything, see the 1972 Dolphins, and for the rest of the great almosts, see the closest teams to a perfect regular season. Then draft your own roster and see how far a clean run gets you.