I don't see Martin making it to Opening Day on the 26 man roster, unless something big happens. I think he starts off in Norfolk atleast.
I think Villar ends up at short and an Alberto/Wilkerson platoon at 2nd.
Catching....Not sure. Severino, unless he gets traded. Sisco, unless they move him or move on from him. Wynns, unless they get rid of him. If they protect Cumberland, do they give him a shot?