Interesting comment thread from Minorleagueball, where they are attempting to assemble a prediction list for Baseball America's Midseason Top 50 Prospects update.
The consensus seems to be that Skaggs, Goldschmidt, and Parker are Dbacks prospects who have a chance to make the list. I feel reasonably confident that Skaggs and Goldschmidt will make it (as long as they don't implode within the next few weeks). Not sure if Parker will, since even though it's expected for pitchers coming back from TJ to not have the same control they used to exhibit, Parker hasn't really improved his control much since coming back from TJ. BA reportedly is in love with Parker though, so it's definitely possible for him to be on the list.