But I would bet that they will stay under. Losing those draft picks would be too painful.
I'm guessing they bank on return from injury (Melton & Verlander & Jobe + others?) as well as a little bit of internal development from the minors (Clark?). No big trade deadline moves. If that is enough to get them into the playoffs, they can bank on Skubal + Valdez to win them series in the playoffs.