John Manuel from BA provides his take:
Ben (Miamisburg, OH): Which Reds top arm (Stephenson, Corcino, Cingrani, Traviesio) has the highest upside?
John Manuel: I'm partial to Travieso but haven't heard anything not to like about Robert Stephenson, he's got to top that list. Corcino gets props for being closest to the majors, and his ceiling is more in the 3/4 range for me. There's not a 7 on the scouting report and for some scouts it's all 50s. I would still take him over Cingrani, though I greatly respect what Tony has done this year and since he got into pro ball. He's a power LHP, those are hard to fine. I'd go Stephenson, Travieso, Corcino then Cingrani, but I could see you shuffling the last 3 in any order and defending it.
Interesting that he likes Travieso more than Corcino or Cingrani, although BA is known to really value draft pedigree/recent draftees.