It is interesting trying to make a BB stat player for some of basketball legends.
You can't look at player stats, because players playing in crappy divisions III, IV, and below can put up big numbers, but that is the equivalent of someone dominating their local pick-up league.
Nash plays against the best players in the world.
Obviously, he would have Legendary passing (20). Possibly no one in the game's history has been better. His Jump shot would be either Colossal (19) or Legendary (20), his free throws would be MAX (prominent) (9), his handling would be extremely high as well. Stamina would be MAX. He would have very high driving (13-15) and jump range (15-17). His outside defense would be prominent (9) at BEST, inside defense and rebounding probably average (6). Shotblocking would be in the (1-3) range.
Now if you want something scary, trying drafting up Lebron James spec sheet. The guy is a monster at EVERYTHING.