Yep, you're talking about throwing 89-91 as a starter vs. throwing (from what I hear) mid 90s in relief. Assuming that's 94-96, that's 5 mph increase. Obviously, it's making a huge difference. Not sure it matters with him in this organization, but I'm sure someone will take notice and you'll see him in an ML bullpen in 2013 at some point. He's topping out mid-90's, but the better news is that his slider has supposedly been "found" again. I've always thought he had some late-inning potential. The Cubs are going to have to make some tough Rule 5 decisions on pen arms. I think Jay's probably on the outside looking-in (left available that is), and I think there's a chance he might get taken. Potential 2013 internal bullpen options include Russell, Cabrera, Beliveau, Dolis, and maybe Parker and Mateo. Who knows where Marmol will end up. Beyond them, there are plenty of 40 man spots occupied by relievers that could go to Jackson. Dempster, Castillo, Camp, Corpas, Germano, and Volstad are all candidates to be relieved of their 40 man spots in the offseason. Struck, Raley, and maybe Hatley are the only Rule 5 eligible pitchers I can think of worthy of protection. I'm not saying that protecting him is a must, but it's a possibility.