The Cubs would need pitching back, and the only pitchers I know of that are near ML ready in the Sox system are Kyle Weiland (Notre Dame guy) and Felix Doubront. Will Middlebrooks could be an intriguing option at 3B. As N&G said, the Cubs would require a big return for Garza, considering his price tag, the value he provides and the chips (Archer and HJ Lee, in particular) that were traded to land him. There isn't a lot in the Sox system that really excites me, but I'm admittedly not an expert.