I don't think Fernandez is going to happen, even if the Marlins made him available. I think the front office is not really interested in that risk/reward profile. That's why they love Lester so much(he has the upside with the durability), that's why they've gone after the Lackeys, Hammels, Feldmans, and Jaxons of the world in free agency instead of the Kazmirs or Brett Andersons. That's why Hendricks was never seriously in doubt of losing a rotation spot, and why Edwards was funneled to the bullpen as quickly as he was. Upside means little when you're constantly rehabbing, especially with the cascading effects that has on the rest of the roster.