All five Dodgers starters were in the top 40 of all SP last year in ERA. Three were in the top 25 in WHIP.
No, its not fair to compare them to the San Francisco Giants rotation, and yet, Tim Lincecum would have had the third best ERA, and fourth best WHIP out of this group. Jonathan Sanchez would have had the fourth best WHIP, and the second worst strikeout-to-walk ratio. Barry Zito would have had BY FAR the worst ERA and WHIP.
No, I don't expect the Dodgers rotation to be as good as their counterparts, but with Rafael Furcal leading off for the likes of Matt Kemp, Andre Ethier, and James Loney, and with Hong-Chi Kuo, Jansen and Jonathan Broxton at the back end, they don't have to be.
If I had to pick right now, I'd take the Rockies to win the West, but make no mistake, it is absolutely a three-team race.