The Hot Stove, continued- 5th starter edition

Ok I'm as excited as the next person about the Prince signing, believe me. It has kept my focus for a few days now, which is saying something. However, one thing I noticed during the press conference was DD saying the team was still looking into the 5th spot in the rotation, maybe some non-roster invites kind of thing. Well that's all I needed to shift my attention to other matters. I was looking at the free agent tracker at MLBTR for remaining starters, and the pickings are slim. But still, I'm always up for some idle speculation, and I can't get enough player transactions evidently. So who do you think makes the most sense, assuming DD's parameters really are now excluding guys like E. Jackson? I say Rich Harden, Livan Hernandez (because of the Marlins connections) or maybe a flyer on a guy like Scott Kazmir might be worth at least a look (but boy he was really terrible in LA). Or at this point is it truly a battle amongst the kids we already have? Oh, and let's get Cespedes.