Lets see... So far arguments have been made for the Rockies, Padres, and Diamondbacks. I'm sure no one would complain about adding San Fran and LA Dodgers to the list since they are bottom 5 in the league for runs scored.
So, is it more that the NL west has crappy hitters or super stud pitchers?
I think it is more about a good mix of stud pitchers (Peavy, C. Young, Webb, Haren, Linecum, Billingsly, etc) than purely crappy hitting. But then again, maybe those pitchers seem studly cuz of the Sallyboys that they face most frequently.