The Baseball Prospectus list is compiled by Jason Parks with input from the various members of the prospect team.  You can read the full list here http://www.baseballprospectus.com/article.php?articleid=22670.  Overall two low rankings and no J.P. Crawford makes this the least optimistic list yet.

A pair of former Phillies prospects made the list in Travis d’Arnaud at #48 and Jonathan Singleton at #57