I saw this in the Herrera thread and found it interesting.
Prior to June's draft, scouts most often cited five players as the most pronounced college groundball pitchers. With this in mind, I went back before the draft and hand-calculated the Ground Outs/Air Outs (not all batted ball data is publicly-available at the college level) for each, to see how Herrera compared:
#1 - Danny Ray Herrera (LHP, New Mexico) 2.86
#2 - Derrick Lutz (RHP, George Washington) 2.23