My current feeling is that the likelihood of the young guys making the season-opening 2019 rotation looks something like, from most to least likely:
Borucki (near lock)
Gaviglio
Reid-Foley
Pannone
I think there's almost no chance of SRF or Pannone making it to start the year. Gaviglio is a bit interesting, because he's acquitted himself reasonably well as a 5th starter over like 120 innings if you think he's run into some poor ERA luck, though I still hope he's in AAA to start the year along with SRF and Pannone.