Ok, heres the story with the Kim/Mantei debate. Kim has been wanting to start for the past two or three years and has yet to have the opportunity. Frankly, I dont see it coming at all this year. Even with the dbacks shaky starting rotation after the big two, I think they would rather solidfy their bullpen with Myers, Kim and Mantei.
I really really doubt Kim will start this year, in fact, it would shock the heck out of me. I think they will slowly work Mantei back into the closer role. But Kim will still get some spot saves.
Hope this helps.