From 1966 to 1968, the league expanded from 9 to 14 teams, introducing the Chicago Bulls, Seattle SuperSonics (now Oklahoma City Thunder), San Diego Rockets (who relocated to Houston four years later), Milwaukee Bucks, and Phoenix Suns.
De 1966 a 1968, a liga pasou de 9 a 14 equipos, coa incorporación dos Chicago Bulls, os Seattle SuperSonics (agora Oklahoma City Thunder), os San Diego Rockets (que se trasladaron a Houston catro anos máis tarde), os Milwaukee Bucks e os Phoenix Suns.