Its never happened as of 2011-12 season
16 teams, 8 from each conference.
eight teams. four in AL and four in NL
I have never found this out yet, but I do know the Red Sox have in 2004 and three other teams have.
You can add one more to that list however many it is, because the Miami Heat are about to do it
There are 7 teams who won an NBA playoff series trailing from 3-1. The Boston Celtics made it twice 1981 and 1968. The last team who came back from a 3-1 deficit is the Phoenix Suns after defeating the Los Angeles Lakers.
how many wild card teams will be in baseball playoff