I think you are greatly overestimating what Polanco would net in return first of all. No way he nets a MLB ready starter. He rates a project like Lachlan Wells, at BEST. Second, Vielma is probably never going to be a starter at the MLB level. His ceiling is more likely utility infielder. Gordon probably will make it as a starter someday. But he's far from certain. Offensively and defensively. He profiles similar to Polanco in that he does a lot of things well, but there is nothing he excels at. Polanco is more advanced though. By the time he was Gordon's current age, he already had a cup of coffee at the MLB level.