Cubs Top Prospects: Jackson Ferris

Will be interesting to see if PD + Ferris can improve him over time.  

Having him eventually emerge as a high-end lefty starter with reasonable control, that would be so huge down the road.  Whether as a premium trade candidate, or as a high-ceiling low-cost starter to slide into the rotation.  Given the investment the Cubs made to get him, I'd love to hope he could aspire to more than a reliever with control problems.  Hope the stuff and velocity plays up better than ever over time, but also that the control can get a little better and a little better, and eventually be not bad at all.  

Aram talks about the huge movement on some of his breaking stuff, too big to hit and too big to control.  I often think of pitch-lab trying add more shape and movement to a guy's breaking ball.  But could they perhaps be able to trim some movement off, and make it somewhat more commandable that way?