Read a recent article which said the White Sox are leaning heavily towards a college stating pitcher to fill out the rotation ASAP. 13 of the last 17 years they have gone with a college player. The Loveable Losers are currently proclaiming their undying love for Starlin Castro. I think Trea Turner will be there at 5.
The neat thing about Kolek is that if he indeed throws 99mph "with ease," that indicates that he has excellent mechanical efficiency. If he doesn't require max effort to reach that kind of velocity, then it implies that he could ease off to a mere 94mph and pick his spots, much like Verlander learned to do. Then, if he really needs it, ramp up to the high 90's. I'd rather see a pitcher do that then try to blow everybody away with non-stop heat. Good pitchers always mix it up. Even Mariano Rivera changed location of his magical cutter.
Regarding the Mark Prior remark - what is the success/non-success rate of young pitchers in this regard? Historically say, in the last ten years or so. Gibson and Wimmers could very well wind up in the non-success column. Too early to tell about Stewart, Thorpe, etc. Thus I still take Turner at number 5 if he is still out there.