I'm not so sure the players who have been moved out are of the quality that would bring back potential impact players. So far there has been a very good but not quite elite leverage reliever with injury concerns, a starting catcher in the midst of a 2 month long slump and having the worst season of his career, and a former top pitching prospect who missed half a decade due to injury and now that he's finally healthy can't reliably retire major league hitters.