List of last undefeated NFL teams by season


This is a season-by-season breakdown of the last undefeated National Football League team in each league, including playoffs. This list indicates the teams who won the most games in a season before suffering their first loss.
The last team in a new season to suffer a loss has won the Super Bowl twelve times. Before the Super Bowl era, the last undefeated team won fourteen Championship games, four of which were in the AFL. The last team with an unblemished record has made 25 Super Bowl and 26 Championship game appearances.
The Bears have been the last team undefeated 17 times, while the next team, the Rams, have been the last team beaten 12 times as of the 2018 season. The Giants hold the mark for beating the last undefeated team. They have accomplished this 11 times, the last time in 2010.

Last undefeated team by season

When teams are sorted, all names of a franchise are grouped together:
Perfect season
Undefeated season
Perfect regular season, lost in the post-season
Subsequently won championship/Super Bowl

Updated as of the 2019 season
YearTeamRecordFirst LossFinal Record
including Playoffs		Playoff Result
49ers8–0–015–4–0Lost Super Bowl
Patriots8–0–012–5–0Lost Wild Card
Rams8–0–015–4–0Lost Super Bowl
Chiefs5–0–010–7–0Lost Wild Card
Vikings5–0–08–8–0DNQ
Panthers14–0–017–2–0Lost Super Bowl
Eagles3–0–010–6–0DNQ
Bengals3–0–010–6–1Lost Wild Card
Cardinals3–0–011–6–0Lost Wild Card
Chiefs9–0–011–6–0Lost Wild Card
Falcons8–0–014–4–0Lost Conference
Packers13–0–015–2–0Lost Divisional
Bears3–0–012–6–0Lost Conference
Steelers3–0–014–5–0Lost Super Bowl
Chiefs3–0–010–7–0Lost Wild Card
Colts14–0–016–3–0Lost Super Bowl
Titans10–0–013–4–0Lost Divisional
Patriots18–0–018–1–0Lost Super Bowl
Colts9–0–016–4–0Won Super Bowl
Colts13–0–014–3–0Lost Divisional
Eagles7–0–015–4–0Lost Super Bowl
Chiefs9–0–013–4–0Lost Divisional
Raiders4–0–013–6–0Lost Super Bowl
Chargers4–0–08–8–0DNQ
Rams6–0–016–3–0Lost Super Bowl
Vikings7–0–012–6–0Lost Conference
Rams6–0–016–3–0Won Super Bowl
Broncos13–0–017–2–0Won Super Bowl
Broncos6–0–016–4–0Won Super Bowl
Vikings4–0–09–8–0Lost Wild Card
Colts4–0–09–8–0Lost Wild Card
Chiefs4–0–09–7–0DNQ
Rams4–0–07–9–0DNQ
Cowboys4–0–015–4–0Won Super Bowl
Dolphins4–0–09–8–0Lost Wild Card
Chargers6–0–013–6–0Lost Super Bowl
Saints5–0–08–8–0DNQ
Dolphins6–0–012–6–0Lost Conference
Redskins11–0–017–2–0Won Super Bowl
49ers10–0–015–3–0Lost Conference
Giants10–0–016–3–0Won Super Bowl
Rams5–0–013–6–0Lost Conference
Bengals6–0–014–5–0Lost Super Bowl
Bears4–0–011–5–0Lost Divisional
Bears6–0–014–3–0Lost Divisional
Broncos6–0–013–6–0Lost Super Bowl
Bears12–0–018–1–0Won Super Bowl
Dolphins11–0–016–3–0Lost Super Bowl
Cowboys7–0–012–5–0Lost Wild Card
Redskins4–0–012–1–0Won Super Bowl
Eagles6–0–010–7–0Lost Wild Card
Bills5–0–011–6–0Lost Divisional
Buccaneers5–0–011–7–0Lost Conference
Rams7–0–013–5–0Lost Conference
Steelers7–0–017–2–0Won Super Bowl
Cowboys8–0–015–2–0Won Super Bowl
Vikings6–0–113–3–1Lost Super Bowl
Vikings10–0–012–3–0Lost Divisional
Cardinals7–0–010–5–0Lost Divisional
Vikings9–0–014–3–0Lost Super Bowl
Dolphins17–0–017–0–0Won Super Bowl
Redskins5–0–09–5–1Lost Divisional
Rams3–0–09–4–1DNQ
Broncos3–0–05–8–1DNQ
Lions3–0–010–5–0Lost Divisional
1969Raiders 6–0–113–2–1Lost Conference
Rams11–0–011–4–0Lost Divisional
1968Raiders 4–0–013–3–0Lost Conference
Cowboys6–0–012–3–0Lost Divisional
Rams6–0–010–3–1DNQ
1967Chargers 5–0–18–5–1DNQ
Colts11–0–211–1–2DNQ
1966Jets 4–0–16–6–2DNQ
Cardinals5–0–18–5–1DNQ
1965Chargers 5–0–29–3–3Lost Championship
Packers6–0–012–3–1Won Championship
1964Bills 9–0–013–2–0Won Championship
Cardinals3–0–19–3–2DNQ
Browns3–0–111–3–1Won Championship
1963Chargers 3–0–012–3–0Won Championship
Browns6–0–010–4–0DNQ
1962 Chiefs Dallas Texans 3–0–012–3–0Won Championship
Packers10–0–014–1–0Won Championship
1961Chargers 11–0–012–3–0Lost Championship
Cowboys2–0–04–9–1DNQ
Eagles2–0–010–4–0DNQ
Lions2–0–08–5–1DNQ
1960Broncos 2–0–04–9–1DNQ
1960 Titans Oilers 2–0–011–4–0Won Championship
Giants3–0–16–4–2DNQ
Packers3–0–07–5–0DNQ
Colts6–0–010–3–0Won Championship
Colts3–0–07–5–0DNQ
Browns3–0–09–3–1Lost Championship
Lions6–0–09–3–0DNQ
Colts3–0–05–6–1DNQ
Rams3–0–08–4–1Lost Championship
49ers4–0–17–4–1DNQ
Browns11–0–011–2–0Lost Championship
49ers5–0–07–5–0DNQ
Giants3–0–19–2–1DNQ
Giants3–0–010–3–0DNQ
Rams6–0–08–3–2Lost Championship
Bears4–0–010–2–0DNQ
Cardinals3–0–010–3–0Won Championship
Redskins3–0–15–5–1DNQ
Bears3–0–19–2–1Won Championship
Rams4–0–010–1–0Won Championship
Eagles5–0–27–1–2DNQ
Bears7–0–19–1–1Won Championship
Bears11–0–011–1–0Lost Championship
Giants5–0–08–4–0Lost Championship
Bears5–0–012–1–0Won Championship
Redskins7–0–09–3–0Lost Championship
Giants5–0–19–2–1Lost Championship
Redskins2–0–16–3–2DNQ
Bears3–0–06–5–0DNQ
Bears5–0–19–2–1Lost Championship
Bears6–0–09–3–0DNQ
Cardinals2–0–16–4–2DNQ
Bears13–0–013–1–0Lost Championship
Bears6–0–011–2–1Won Championship
Packers8–0–110–3–1 zone 2 2nd place
Packers9–0–012–2–0 z] Named champ
Packers8–0–010–3–1 z] Named champ
Packers12–0–112–0–1 z] Named champ
Yellow Jackets3–0–011–3–2 zone 2 2nd place
Wolverines3–0–07–2–1 zone 3 3rd place
Bears2–0–17–5–1 zone 5 5th place
Bears5–0–19–3–2 zone 3 3rd place
Bears11–0–212–1–3 zone 2 2nd place
Detroit Panthers6–0–28–2–2 zone 3 3rd place
Cleveland Bulldogs5–0–17–1–1 z] Named champ
Canton Bulldogs11–0–111–0–1 z] Named champ
Canton Bulldogs10–0–210–0–2 z] Named champ
Buffalo All-Americans9–0–29–1–2 zone 2 The Staley Swindle
2nd place
Akron Pros8–0–38–0–3 z] Named champ
YearTeamRecordFirst LossFinal Record
including Playoffs		Playoff Result

Note 1: The NFL did not have playoff games until the 1933 season.

Note 2: Buffalo and Chicago both had 9–1 records. Chicago was awarded the championship when the league instituted a new tiebreaker rule at the end of the season.