The most glowing report I could find on Trey Ball:
Scouting Report and 2015 Outlook: Coming into the year, the expectations for Ball were high based upon his draft position, but after seeing him in Spring Training we warned readers that he was less advanced than a normal high first-round pick and his development could be slow. Accordingly, it was a struggle for Ball earlier in the season, but then he started to make strides as the year progressed. Ball has a great pitcher's frame, listed at 6-foot-6, 190 pounds. He is on the skinny side at present with room to fill out, especially in his lower half. He throws from a three-quarters arm slot with a smooth, low-effort delivery, although he struggled to repeat his mechanics during the season. Ball’s fastball can sit in the 90-92 mph range, getting all the way up to 95, but his velocity was inconsistent during the year, dipping down into the high-80s for some starts before recovering later in the season. Most concerning from reports was that Ball’s arm looked slow at times, and the fastball lacked life and was not missing bats, with hitters squaring it up often. Ball’s secondaries include a changeup and curveball, with his changeup the more advanced of the two at present. Ball has good feel for his changeup that he throws in the low-80s. His curveball showed improvement later in the year after he altered his grip, according to Alex Speier, and this coincided with his improved results. Ball's curveball is a long, left-hander's curveball with good shape and depth when he snaps it off and finishes the pitch. Both pitches, however, need refinement and improved consistency from outing to outing. Overall, Ball’s development could go a lot of ways depending on what happens next season. He could re-establish himself as one of the more exciting young pitching prospects in the system, or guys like Michael Kopech and Jake Cosart could pass him if he stagnates. Ball will compete for a spot in Salem during spring training, but because of his struggles this year, I expect him to start the season with Greenville with the eye towards a promotion after a few months. - Ian Cundall