After Zimmermann gets called up, we need to have open tryouts for the order of the starting rotation. In other words, if Olsen and Cabrera wind up 4 & 5 in the rotation, so be it. Nobody in this rotation, except maybe Lannan, has earned the benefit of any doubt.
If Martis and Zimmermann are two of our three best pitchers, then so be it.
They can't really switch the order in the middle of April.
