How so?
Ban dunking, force all players who are 7 feet or taller to play with a blindfold, end all legacies ( You cannot play in the NBA if you have a father or uncle who played in the league, even for a short while), move the 3 point line out 5 feet deeper, make the rim 6 inches higher and the biggest change= All NBA players must graduate from college and play 4 years.
That last part would make the NBA majority white and asian, but the other parts I listed would be akin to the affirmative action regulations forced onto the population by academia for the past 3 decades.