Here are the colleges with the most players on 2019-20 NBA opening day rosters

On opening day of the 2019-20 NBA season, 128 NCAA schools have a player on an NBA roster. For the second year in a row, no schools have more representation around the league than Kentucky and Duke.

source https://www.ncaa.com/news/basketball-men/article/2019-10-21/here-are-colleges-most-players-2019-20-nba-opening-day