For this list, we kept it relatively simple. We ranked every franchise in BAA, ABA and NBA history. All franchises were considered, even defunct ones. Officially, there have been 53 franchises that have played in those three leagues. Obviously, there are 30 franchises still active in today’s NBA, so the 23 extra are either ABA teams that didn’t make the jump to the NBA in 1976 or franchises that went under in the early days of pro basketball. In creating this list, we didn’t use a formula, as nuance was needed to account for a variety of factors. Some of the factors we took into account were winning, sustainability, number of years active, popularity throughout the years and great players. Let’s get to it.