I don't really like the Peavy/Santana comparison, but Marmol has shown he can be a starter, quite a good one too. At AA he put up a 1.16 WHIP, 10.39 K/9, and 2.68 K/BB. He followed that up with 7 starts in AAA before going to the Chicago pen: 1.02 WHIP, 10.53 K/9, and 4.00 K/BB. Those are outstanding numbers, and considering his stuff and the fact that he wasn't too old for those levels, they could project him as a very good starter, certainly better than middle of the rotation. Personally, I don't mind Marmol's usage thus far. It's a little more than I'd like at this point pitch count wise, but he's been rested appropriately, and I have confidence that as Howry and Wuertz round into form that he'll be used better.