So move him to 2B and Baez to 3B. i like this: CF - Alcantara SS - Russell 1b - Rizzo 3b - Bryant RF - Soler 2b - Baez LF - R. Castillo C - W. Castillo After swapping Castro for an established Ace like Hamels, perhaps that makes Chicago more attractive to Lester or Scherzer, and the Cubs nab one of them to round out the rotation. So you have two aces, Arrieta, Hendricks, and Turner and a bullpen full of fell creatures to add to the lineup of heroes. In summation, my four arguments for Hamels are: 1. He'd be easier to acquire 2. He's signed for only 4 more guaranteed years which takes him to 34 by the end of the deal 3. If there is a dropoff in production from Castro to Russell (which there almost certainly won't be), the upgrade of Hamels to Jackson or Wood or whomever would more than make up for it. 4. The changeup he throws as his out pitch is much easier on the arm than the breaking stuff others throw But you're essentially assuming that the largely established Castro is all but a lock to be outperformed by a bunch of prospects. I'd rather keep him, and if you're so concerned with making room for all of these guys then simply leave out Castillo or trade Alcantara.