I am all for putting Joba in the starting rotation. It's much easier to find a pitcher pitching well in one inning than a pitcher pitching well in 6 to 7 innings. If it doesn't work out, we always can put Joba back to the bullpen and prepare him as Mo's successor.
I am kind of person always like to face new challenge. I believe Joba(most athletes) is the same kind of person. If we never try, we will never know what will happen. I also believe we can find another Joba-like set-up man down the farm. On top of that, I don't think we need to worry about closer's situation when you consider how good Mo has been.
I believe a lot of people will point their fingers to how bad Kyle Farnsworth pitch today or that Met game which he gave up two home runs to prove their point why shouldn't turn Joba into a starter . In my opinion, relievers except inhuman Mo will have one of those days. As long as he pitch well at the majority of appearances, I am fine with that. I actually think Farnsworth doesn't pitch too bad today. He gave up that single after 13 pitches at bat and let Sexson run into a homer when he try to run a fastball inside that most Yankees pitchers got him tonight. Unfortunately, Kyle put the ball a little bit middle of the plate. Don't get me wrong, I don't trust Kyle, but I believe we have good bullpen, such as Veras, Edwar,....etc.
Close your eyes and dream about this. In 2009, we have a rotation including Wang, Joba, Hughes, Kennedy, Pettitte(I hope Andy come back for one more season). WoW!