Martis and Lannan are the only ones deserving of being in the rotation. i'd replace Zimmermann, Cabrera, and Olsen with Stammen, Detwiler, and Balester. from what i saw last year from Balester and this yr from Zimmermann... Balester > Zimmermann.
at this point, it seems balester and zimmermann are interchangeable. balester walks a lot of people and gives up home runs, while zimmermann just has consistency issues IMO
nick and guzman helping us get back in this game