The Red Sox are desperate for pitching and are rumored to be looking at a Derek Holland for Jacoby Ellsbury trade. I think the Reds might be able to match that offer with one of Bailey or Leake, although Leake might be a stretch. (
Here's a comparison of the three starters).
Would it be worth dealing Bailey or Leake, given that 1) Ellsbury is only under team control for one more year and 2) Ellsbury has a considerable injury history? Seems like a high-risk, high-reward move.