They started him in high-A and moved him up to AA his first season (signed late in 2009, apparently). Even had a taste at AAA. The next year he started at AAA. Age 23 season. Got injured, they shut him down in July; his first 10 starts had decent results (3.60 ERA), it started to go downhill after that so his total numbers weren't good. TJ surgery. Returned pretty fast, about 12 months later, pitched some rehab-style innings, plus the AFL later. Back in AAA for age 25 season. Even guys like me who pay overly much attention to age-and-level don't believe that someone gets much better (and closer to major-league ready) simply by aging a year. They weren't aggressive about pushing him to the majors post-TJ, but pre-TJ he was on a fast track (as befits a #22 overall college draft pick), and I can't see how they can be accused of dawdling given the injury.