Each are in the same 3 way tie--with 2 Finals appearances each, and one championship each...here is the NBA's new 2/1 club.
Team NoFinals W/L Win/Yr Loss/Yr.
Dallas Mavericks 2 1 1 2011 2006
Miami Heat 2 1 1 2006 2011
Milwaukee Bucks 2 1 1 1971 1974
I would only add year of inception because those other other two have done it in far less time.
Actually the Bucks did it much quicker. In their third and sixth year in franchise history.