Every Undefeated NFL Team, and How Each Season Ended

Eight NFL teams have finished a regular season without losing. Exactly one of them finished the whole year that way. The 1972 Miami Dolphins went 14-0 and then 17-0, and more than fifty years later nobody else has done it - the closest anybody came was a team that went 16-0 and lost the last game of the year, which is a worse outcome than never getting there at all. Before either of them, a team in a rival league went unbeaten and the record books spent decades arguing about whether it counted. This is the complete list of undefeated seasons in professional football, what happened to each one, and why the whole category has probably closed for good.

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What Undefeated Actually Means

Three different things, and the distinction decides who is on this list.

Undefeated and untied is the strict version: no losses, no draws, in a season when ties were still common. Four teams have done it across a full regular season, and one of those also won every playoff game.

Undefeated with ties was more achievable in the sport's early decades, when games regularly ended level and the standings were calculated by ignoring ties entirely. Four champions fall into this bucket.

A perfect season means every game, including the postseason. Two teams in the history of professional football have managed it, and only one of them did it in the NFL.

1972 Miami Dolphins - 17-0, and the only one

14-0 in the regular season, the best record in the league by three full games, and 17-0 once the playoffs finished.

The postseason was closer than the legend suggests. Miami beat Cleveland 20-14, then won the AFC Championship at Pittsburgh 21-17, then beat Washington 14-7 in Super Bowl VII. Three one-score games against three good teams, with the whole season on the line each time.

The strangest part of the story is at quarterback. Bob Griese broke his ankle in week five, and Earl Morrall started the rest of the regular season - the same Earl Morrall who had been voted league MVP four years earlier and then watched his team lose the biggest upset in Super Bowl history. Griese came back to relieve him in the second half of the AFC Championship Game and started the Super Bowl. A perfect season was completed by two quarterbacks, neither of whom played all of it.

Nine Dolphins made the Pro Bowl that year. Don Shula was in his third season with the franchise and would go on to win more games than anybody who has ever coached, as covered in the greatest NFL head coaches of all time.

2007 New England Patriots - 16-0, then 18-1

The only team ever to complete a 16-game regular season undefeated, and the last team to complete an undefeated regular season of any length.

That first sentence is now permanent. The league moved to a 17-game schedule in 2021, so the specific achievement of going 16-0 cannot be repeated by anybody. New England were the eighth team in NFL history to finish a regular season unbeaten, the first since 1972, and the fourth to do it without a tie.

They scored 589 points, which was the record at the time. They won two playoff games. And then they lost the Super Bowl 17-14 to a wild-card team, which is why the number attached to this season is 18-1 rather than 19-0.

It is the cruellest result in the sport's history, and it is the reason the 1972 record still stands. The 2007 Patriots were, by almost any measure, a better team than the 1972 Dolphins. They finished with one more loss.

1948 Cleveland Browns - the first, and the disputed one

14-0 in the regular season and 15-0 with the championship game, in the All-America Football Conference.

It was the only undefeated season in professional football history until Miami matched it 24 years later, and it is left off most lists because it happened in a rival league. The Browns won all four AAFC championships and then joined the NFL and won that too in their first season, which is fairly strong evidence that the competition was not the problem.

The argument about whether it counts has never been settled. An Ohio senator wrote to the NFL commissioner in 2008 asking the league to officially recognise AAFC statistics, including this season. The league has not.

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1934 Chicago Bears - 13-0, and beaten in the last game

The first NFL team to finish a regular season undefeated and untied, and the first to lose the championship game anyway.

Chicago went 13-0, then lost the title game 30-13 to the Giants. The 2007 Patriots are not the first team to carry a perfect record into the final game and hand it back; they are the third.

It is worth noting how narrow the margin for this kind of season was in the 1930s. A thirteen-game schedule meant one bad afternoon in November ended it, and the championship was a single game rather than a bracket, so a team could be demonstrably the best in the league for four months and finish the year with nothing. That is exactly what happened here.

1942 Chicago Bears - 11-0, and beaten in the last game

The same franchise, eight years later, with the same ending.

The Bears went 11-0 and lost the championship game 14-6 to Washington. Two undefeated regular seasons, two championship-game defeats, from one team inside a decade. Nobody else has managed to lose an unbeaten season twice.

The Four Champions Who Went Unbeaten With Ties

Before the modern era, a team could finish a season without losing and still not be undefeated in the strict sense.

The 1920 Akron Pros went 8-0-3 and were named champions of the league's first season. The 1922 Canton Bulldogs went 10-0-1 and the 1923 Canton Bulldogs went 11-0-1, giving one franchise consecutive unbeaten championship seasons. The 1929 Green Bay Packers went 12-0-1.

All four won titles, which puts them ahead of the 1934 and 1942 Bears on the only measure that ultimately counts. Ties were simply part of the sport then, and a drawn game was recorded and set aside rather than folded into the win percentage at all.

The Near Misses

Several teams have got most of the way there and not finished.

The 2009 Indianapolis Colts were the last unbeaten team standing after week 15 at 14-0, then rested their starters, lost, and eventually lost the Super Bowl too.

The 2011 Green Bay Packers started 13-0 and finished 15-1, which remains the best record any defending Super Bowl champion has ever posted. They lost their first playoff game.

The 2015 Carolina Panthers went 14-0 before their first defeat and finished 15-1, becoming the seventh team to win at least fifteen regular-season games since 1978. They lost the Super Bowl 24-10.

The 1985 Chicago Bears, who had one of the greatest defenses ever assembled, lost exactly one game - in week thirteen, on a Monday night, to the Miami Dolphins.

The Other Extreme: The Winless Seasons

The mirror image is rarer than people assume, and it arrived much later.

The 2008 Detroit Lions went 0-16 and became the first team in NFL history to lose every game of a sixteen-game season. The 2017 Cleveland Browns matched it nine years later, and in doing so became the first franchise ever to post consecutive seasons of fifteen or more losses.

Before either of them, the 1976 Tampa Bay Buccaneers went 0-14 in their first season of existence, failing to score at all in five of those games. Only four winless seasons have occurred since the 1970 merger, which is a smaller number than most people guess and close to the number of perfect ones.

The near-miss on this side is worth a mention too. The 1980 New Orleans Saints reached 0-14, then won their second-to-last game and finished 1-15, which is the losing equivalent of a team resting its starters at 14-0.

What the two extremes share is that they are both products of the schedule getting longer. Nobody went 0-16 before the sixteen-game era for the same reason nobody has gone 17-0 since the seventeen-game era began: more games means more chances for the outlier to break.

Why It Probably Will Not Happen Again

Three reasons, and they compound.

The first is schedule length. Seventeen games is more opportunities to lose than fourteen or sixteen, and the difference is not linear. A team with an 85 percent chance of winning any given game has roughly a one-in-ten chance of going 14-0 and roughly a one-in-sixteen chance of going 17-0. Add the playoffs and the number gets small quickly.

The second is parity by design. The salary cap, the draft order and the schedule formula all work to compress the talent range, and the gap between the best team and a bad team is narrower now than it was in 1972. Miami's regular-season record that year was three games better than anybody else's. A modern great team is usually one or two games clear.

The third is that teams no longer want it. Once a playoff seed is secured, the rational move is to rest starters, and several near-misses above ended precisely because a coach chose health over history. The 1972 Dolphins had no such option, because the league was smaller, the bracket was shorter and there was nothing to clinch early.

What the 1972 Dolphins Actually Had

It was not a superteam in the way the 2007 Patriots were, and that is the interesting part.

They had a defense that nobody could name at the time, which is why it is still called the No-Name Defense, and a running game that ground out four-yard gains until the clock ran out. They had a coach who would go on to win 328 regular-season games, more than anyone in the sport's history. And they had the depth to lose their starting quarterback in week five and not drop a single game afterwards.

That last point is the one worth remembering. A perfect season is usually imagined as a team with no weakness. The only one that ever happened belonged to a team whose most important player got hurt in September, and whose backup was a 38-year-old who had already lost a Super Bowl of his own.

The second thing they had was a soft schedule, which is the objection raised against this season more than any other and the one worth taking seriously. It is a fair criticism, and it does not change the result. Plenty of teams since have had favorable paths on paper. None of them went unbeaten.

And the third is that they were already there. Miami had reached the Super Bowl the previous season and lost it 24-3, which is the single most useful fact about the 1972 team: a perfect season was not the beginning of something, it was a group of players who had been humiliated on the biggest stage twelve months earlier and spent a year refusing to be beaten again.

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