Each NBA draft class is filled with players who will never reach their full potential.
A player's production, mixed with where he was taken in the draft, determines whether or not he's a bust.
For example, if Kwame Brown were taken with the No. 21 pick in 2001, he would not be considered a bust. Brown, taken first overall, is in his 12th season, and he has put up very average numbers.
The players on this list will be more along the lines of Brown. This doesn't mean they will be out of the NBA in a few seasons, but their careers will be considered disappointing because they'll never reach their pre-draft potential.