Boston Celtics records

1947–2026

Worst seasons

Lowest regular-season win percentage

  1. 1997 15–67
  2. 2007 24–58
  3. 2014 25–57
  4. 1950 22–46
  5. 1979 29–53

Best seasons

Highest regular-season win percentage

  1. 1973 68–14
  2. 1986 67–15
  3. 2008 66–16
  4. 1960 59–16
  5. 2024 64–18

Best starts

Wins to open a season

  1. 14 to start 1958
  2. 11 to start 1965
  3. 10 to start 1973
  4. 8 to start 2008
  5. 7 to start 1964

Worst starts

Losses to open a season

  1. 5 to start 1947
  2. 4 to start 1950
  3. 4 to start 1970
  4. 4 to start 2014
  5. 3 to start 1951

Win streaks

Consecutive wins

  1. 19 2009
  2. 18 1982
  3. 17 1960
  4. 16 1965
  5. 16 2018

Losing streaks

Consecutive losses

  1. 18 2007
  2. 13 1994
  3. 13 1997
  4. 10 1949
  5. 10 1997

Biggest wins

Largest margins of victory

  1. 133–77 Chicago Bulls 2019
  2. 125–71 Toronto Raptors 2025
  3. 128–75 Sacramento Kings 2022
  4. 140–88 Golden State Warriors 2024
  5. 155–104 Indiana Pacers 2024

Worst losses

Largest margins of defeat

  1. 66–118 Detroit Pistons 2003
  2. 77–124 Orlando Magic 1995
  3. 69–114 Washington Wizards 2003
  4. 86–130 Cleveland Cavaliers 2017
  5. 84–128 Portland Trail Blazers 1977

Postseason

Seasons that reached the playoffs

  1. 2026 3–4
  2. 2025 6–5
  3. 2024 16–3 title game
  4. 2023 11–9
  5. 2022 14–10 title game
  6. 2021 1–4
  7. 2020 10–7
  8. 2019 5–4

NBA Finals appearances

Seasons that reached the NBA Finals

  1. 2024 won NBA Finals
  2. 2022 lost NBA Finals
  3. 2010 lost NBA Finals
  4. 2008 won NBA Finals
  5. 1987 lost NBA Finals
  6. 1986 won NBA Finals
  7. 1985 lost NBA Finals
  8. 1984 won NBA Finals
  9. 1981 won NBA Finals
  10. 1976 won NBA Finals
  11. 1974 won NBA Finals
  12. 1969 won NBA Finals
  13. 1968 won NBA Finals
  14. 1966 won NBA Finals
  15. 1965 won NBA Finals
  16. 1964 won NBA Finals
  17. 1963 won NBA Finals
  18. 1962 won NBA Finals
  19. 1961 won NBA Finals
  20. 1960 won NBA Finals
  21. 1959 won NBA Finals
  22. 1958 lost NBA Finals
  23. 1957 won NBA Finals
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