It has happened eight times in a series of seven games or more. The comeback teams were:
• The 1921 New York Giants over the New York Yankees, 5-3.*
• The 1955 Brooklyn Dodgers over the New York Yankees, 4-3.
• The 1956 New York Yankees over the Brooklyn Dodgers, 4-3.
• The 1958 New York Yankees over the Milwaukee Braves, 4-3.
• The 1965 Los Angeles Dodgers over the Minnesota Twins, 4-3.
• The 1971 Pittsburgh Pirates over the Baltimore Orioles, 4-3.
• The 1985 Kansas City Royals over the St. Louis Cardinals, 4-3.
• The 1986 New York Mets over the Boston Red Sox, 4-3.
*The 1921 World Series was the last in the best-of-nine format.
No teams in the NBA have ever come back from a 3-o series deficit in any NBA 7 game series including the Finals.
miami heat 2006 vs dallas
Sharks
The 2001 New York Yankees
Which NBA teams have come back after being 3-0 in a playoff series
No one has completed this feat in NBA history yet
Montreal Canadiens came back from a 3-1 deficit in 2010
Teams that are down 3-1 in the NBA playoffs have historically faced a tough challenge. However, there have been instances where these teams have managed to come back and win the series. According to historical records, teams down 3-1 have come back to win the series about 11 of the time.
You can add one more to that list however many it is, because the Miami Heat are about to do it
Most of the teams who have successfully rallied from a 3-1 hole (six of the eight) enjoyed homecourt advantage.
Only one team.....Los AngelesLakers
There were no teams ever came back from 3-0 deficit. There were some who forced a game 7 though. However, there were 7 teams to win a playoff series from 3-1 deficit.