We are not getting Patino for Jason Castro. Being in SD, I follow the Padres quite a bit and they are getting Castro to platoon with Hedges. Mejia seems like the odd man out there, especially with Campusano in the wings. He would be a homerun if we were able to get him but I highly doubt it; Pads might use him in a bigger deal for pitching.
It's going to be cash, PTBNL, or some marginal/high ceiling_low floor type guy.