Let me start by stating I did not initiate the quote relating to Jaylen Brown possibly being "too smart for the League". The quote was supposedly made by an anonymous NBA executive prior to the 2016 draft (per TheUndefeated's Marc J. Spears):
This is the kind of 19-year-old NBA draft prospect who, for instance, chooses to enter the draft without an agent, a young man who one NBA executive said could be deemed “too smart for the league.”
Say hello to (Jaylen) Brown, the most interesting prospect of the 2016 NBA draft.