This guy should have been a high first round MLB pick, but He's playing in Nashville for Vanderbilt. At His age, pitchers are primarily judged on the speed of their fastballs. Down the line, control and command (which are different things) are expected. Finally, secondary stuff is what makes a great pro player.
Apparently Kumar has good radar-gun speed. He also has a 6'5" frame, which adds to His release point and reduces the time hitters would have to react to His pitches. He's a bit overweight, but that is much easier to deal with as pitcher (see C.C. Sabathia) than as a hitter.
I'm guessing He already has good control and fair commmand. I don't know about His secondary stuff. I'll have to listen to the Vandy games next Spring to hear which pitches He throws for strikes and how He gets people out.
Net: Kumar Rocker is already high on the list of potential #1 overall picks.