Off the top of my head I'd imagine the Cubs would be interested in guys like Martin Perez, Justin Grimm, Luke Jackson, etc. Their better pitching prospects, basically. They've got some decent pitching prospects to consider. As much as I like Olt and his upside, he made a lot more sense last year when the Cubs didn't really have a "3B of the future" and Baez was making people think he could move Castro off SS. With Bryant or Baez both likely capable of playing 3B long term, though, and with Vitters at AAA he becomes a little redundant at the moment and will eventually become an odd man out since those coming up behind him are probably a bit more talented. That being said, acquiring him could lead to a future lineup that includes in IF of Rizzo, Castro, Baez, Olt, and an OF of Bryant, Almora, and Soler. It'd be tough finding a better "lineup of the future" in all of baseball in that scenario.