There have beenonly seven teams.
No team has ever come back from a 3-0 deficit in playoff history.
Which NBA teams have come back after being 3-0 in a playoff series
The steelers, The Rams, Phillies, Dodgers, and Bulls
No one has completed this feat in NBA history yet
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.
Boston Red Sox, Toronto Maple Leafs, Philadelphia Flyers, and New York Islanders
There are actually only 7 teams in the NBA who rallied from 3-1 to win a playoff series. They are the Boston Celtics (1968), Los Angeles Lakers (1970), Washington Bullets (1979), Boston Celtics (1981), Houston Rockets (1995), Miami Heat (1997), Detroit Pistons (2003) and the Phoenix Suns (2006). So Mathematically only 23.33% of all NBA teams won an NBA playoff trailing from 3-1.
In 2004 the Boston Red Sox beat the New York Yankees 4 games to 3 after trailing 3 games to none.