The Milwaukee Bucks have just one championship in franchise history, but that team is among the greatest of all time. Kareem Abdul-Jabbar (known as Lew Alcindor at the time) was in his second season in the league, but the addition of Oscar Robertson was key to their 1970-71 title run. Alcindor led the league with 31.7 ppg as the Bucks finished the regular season 66-16, which included a 20-game winning streak. They continued to roll through the playoffs, defeating the San Francisco Warriors and Los Angeles Lakers in five games each, then swept the Baltimore Bullets in the NBA Finals.
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Boston Celtics, 1964-65 - Regular season: 62-18
Several of the Boston Celtics teams that won 11 NBA titles in the 1950s and 60s are good enough to make this list, but the 1964-65 group may be the best of the bunch. Bill Russell (6) and Sam Jones led the Celtics to a then-NBA record 62-wins that season. They knocked off Wilt Chamberlain's Philadelphia 76ers in the Division Finals in seven games and denied Elgin Baylor and the Los Angeles Lakers another title.
Detroit Pistons, 1988-89 - Regular season: 63-19
Isiah Thomas, Joe Dumars (pictured) and Dennis Rodman led one of the most dominant defensive teams of all-time. Not many could get past the 1988-89 Detroit Pistons as they went 63-19 in the regular season. They swept the Boston Celtics and Milwaukee Bucks in the first two rounds of the playoffs before knocking out Michael Jordan and the Chicago Bulls in six games in the Eastern Conference Finals. Meanwhile, the two-time defending champion Los Angeles Lakers went 12-0 on their way to the NBA Finals, but were swept themselves by the Pistons.
Andrew D. Bernstein
Chicago Bulls, 1991-92 - Regular season: 67-15
Fresh off the franchise's first-ever championship, Michael Jordan and the Bulls were hungry for more. Jordan and Scottie Pippen dominated in 1991-92, averaging 51.1 ppg combined, as Chicago went 67-15 during the regular season. But it took seven games to get past the New York Knicks in the East Semifinals and six against the Cleveland Cavaliers to reach the NBA Finals where they beat Clyde Drexler and the Portland Trail Blazers to win their second consecutive title.
Philadelphia 76ers, 1982-83 - Regular season: 65-17
After falling short in the NBA Finals three of the previous six years, the Sixers brought in Moses Malone prior to the 1982-83 season. Playing alongside Julius Erving and Maurice Cheeks, Philly went 65-17 during the regular season. Malone made a bold prediction that the Sixers would sweep every team in the playoffs by stating, "Fo', Fo', Fo'." They weren't perfect, losing just one game in the conference finals, but they swept the defending champion Los Angeles Lakers for the title.
Los Angeles Lakers, 1986-87 - Regular season: 65-17
Following a 62-win season which they failed to make the NBA Finals, the 1986-87 Lakers were ready to reclaim the crown. Magic Johnson averaged a career-high 23.9 ppg and led the league in assists with 12.2 to earn his first of three NBA MVP awards, snapping Larry Bird's three consecutive seasons of holding that honor. The Lakers went 11-1 in the first three rounds of the playoffs before meeting Bird and the Boston Celtics in the NBA Finals. Johnson, Kareem Abdul-Jabbar, James Worthy dethroned the defending champs in six games.
Andrew D. Bernstein
Chicago Bulls, 1996-97 - Regular season: 69-13
What could Michael Jordan and the Bulls do for an encore after arguably the greatest season in NBA history? Chicago didn't win 70 games again, but came close with Jordan, Scottie Pippen and Dennis Rodman continuing their quest for a repeat with a 69-13 regular season record. The team's signature moment came in the NBA Finals with Jordan leading the Bulls to a crucial Game 5 win while battling the flu. Chicago went on to beat Karl Malone, John Stockton and the Utah Jazz in six games and again the following season for their second three-peat.
Boston Celtics, 1985-86 - Regular season: 67-15
No team in NBA history protected their house like the 1985-86 Boston Celtics as they went 40-1 at home. Bill Walton joined a team already loaded with talent, led by Larry Bird, Robert Parish and Kevin McHale. Bird would win his third consecutive league MVP and Walton was named Sixth Man of the Year. Motivated after losing the title to the Los Angeles Lakers the year before, the Celtics dominated the regular season with a 67-15 record. They went 11-1 in the first three rounds of the playoffs before defeating Hakeem Olajuwon and the Houston Rockets in six games in the NBA Finals.
Los Angeles Lakers, 1971-72 - Regular season: 69-13
Lakers legend Elgin Baylor was forced to call it quits early into the 1971-72 season, but that didn't affect the team's run for a title. A star-studded roster led by future Hall-of-Famers Jerry West and Wilt Chamberlain went on a NBA record 33-game winning streak and dominated away from home with a 31-7 road record. They defeated the New York Knicks in the NBA Finals in five games for the franchise’s first title since moving to Los Angeles.
Chicago Bulls, 1995-96 - Regular season: 72-10
With Michael Jordan back for his first full season and Dennis Rodman joining the club, the Bulls broke records all season in 1995-96. They raced to a 41-3 start and finished 72-10 as the first and still only team to win more than 70 games. After cruising their way through the first three rounds of the playoffs, Chicago met the Seattle SuperSonics in the NBA Finals, who had an impressive regular season of their own with a 64-18 record. But the Sonics were still no match as Jordan and the Bulls completed their historic season with their fourth title in six years.