The reason he gets the walk totals is directly related to his dramatic increase in power from 99 to 01. He was actually starting an appropiate decline for his age after 1996 then suddenly he more than doubles his HR total (per season) in two seasons. His BBs then begin to go through the roof. His performance is such an aberration. I would imagine the game could be coded so that every 20 years infuse the possibility of a Bonds like performance into a single player but whether it would come to pass would depend on other talent variables. So this would make it possible for the kind of numbers you are talking about to happen only once every 100 years. Is that more on topic?