Prospects That Matter: Yellow
These players were selected based on a rating system that took into account their relative age, level, and performance, which was also adjusted by position and role (starter/reliever). You can read much about this here,here, and here.
Prospects of Interest: Orange
These are players who didn't meet PTM for one reason or another but in my (subjective) mind worthy of interest to the casual fan. For instance, players who didn't meet Plate Appearance or Innings thresholds weren't included in the PTM ratings, and PTM didn't count short-season results. So players like Kyle Crockett (not enough innings),Clint Frazier (short-season) and Francisco Mejia (short-season), while they aren't PTMs, are very much worth following.
Today (the 13th) is Opening Day for Mahoning Valley. Here's my best guess at the depth chart based on previous usage (the four pitchers noted as starters were starters last year in Arizona). This will be modified as games are played and I get a better idea as to how everyone will be used.
The three prospects I've marked as "Prospects of Interest" are C Francisco Mejia, RHP Kieran Lovegrove, and LHP Sean Brady. All three were in the Arizona Summer League a year ago, and have ability and age on their side.
Usually college draft picks head to Mahoning Valley, with high school picks heading to Arizona. Zimmer and Papi may skip Niles for Eastlake depending on how the Indians want to treat their development.