They'll be moving to high A Lancaster first. I wouldn't be surprised to see a couple get called up around the All Star break.
I read a while back that the organization wants to let the Lexington rotation gain confidence in their ability before sending them to Lancaster, whose home stadium is a bandbox. So I'm sure as they move up to Lancaster we'll see some inflated ERAs. I don't mind them taking their time with any of these guys considering how good they look on the mound and getting their arms up to par.