In order to be eligible for this list, a player must be 24 years or younger as of today (i.e. been born on or after January 11, 1988), and must have already exhausted his rookie of the year eligibility. So players like Jurickson Profar and Dylan Bundy don't qualify -- they'll appear on my top 100 prospects rankings in early February --while players like Mike Minor and Mat Latos just barely missed the age cutoff.
His thoughts on Tillman were particularly interesting:
Current: Tillman looked like a lost cause at the start of the 2012 season, but when he returned from exile in July, he started to resemble the guy who was a top-40 prospect in the game heading into the 2009 season. Tillman's fastball velocity returned, as he was sitting in the low 90s again and touching 95-96 while his curveball regained its old bite. The one new item is the much-improved changeup -- 80-84 with late fade -- a pitch Tillman likes to throw middle-away or down and away to lefties as an out pitch.
Future: As a prospect, Tillman projected as a No. 2 starter whose curve was his out pitch and whose change would be good enough. He's probably back to that ceiling, but now it's more of a question of improving his fastball command to get him to that point. For a guy who looked like a fifth starter or worse just seven months ago, this is an outstanding turnaround