He was excellent at preventing runs in rookie and short-season ball, but Medina didn't give us a full taste of his upside until he reached Low-A. His strikeout rate jumped from 12.8 percent to 26.3 percent -- the third best mark in the Sally League. He commands a plus mid-90s fastball with late life, already boasts one of the best changeups in the minors, and made huge strides last year with his slider, which has emerged as another potentially plus offering. At 6-foot-1, 185 pounds, Medina doesn't have prototypical size, but he is an excellent athlete who gets good extension on his pitches. His BB/9 improved from 3.43 to 2.43 in the second half, showing an ability to make more than one adjustment as a 20-year-old. Young pitchers with his feel and makeup are rare, so it would be irresponsible to say with confidence what his ceiling is. He will head to High-A for the first time, but could be pushed aggressively, setting him up to contribute in the big-league rotation in 2019. Read Past Outlooks