I was going to make this thread myself, so props.
Minimizing walks and HRs are the keys to his success as a KB pitcher, and those two things have a lot to do with his velocity IMO.
Pillar has the 3rd highest BsR in baseball, believe it or not:
http://www.fangraphs.com/leaders.aspx?pos=all&stats=bat&lg=all&qual=y&type=8&season=2015&month=0&season1=2015&ind=0&team=0&rost=0&age=0&filter=&players=0&sort=18,d