We only need 1 other pitcher considering we have a lot of young pitchers fighting for those spots.
And those young pitchers can start next season in Syracuse. You shouldn't depend on them from day 1. They should be called up if the good, solid veterans we sign fall through.
Why are we always expected to rush our prospects up. Other, mature, FO let their young players spend time, sometime lots of time, in the minors and don't expect them to perform in the majors so quickly.
Hell, I might consider starting Zimmermann in Syracuse and certainly Strasburg.