On the OP and Burks: Jazzfanz are always looking for players to gain weight.
Weight is a disadvantage for most basketball players.
Look at Duncun, Parker, and Ginobli. They are skinny veterans.
Warning: this post occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).
Stolen with love from the XKCD comic.
Being fast because you are not too heavy helps you be good.