To go with 5 balks and runners have successfully stolen 17 of 23 bases against him. Seems like a high legkick guy that telegraphs his move(most commonly by looking at first when he throws home, and home when he comes to first, or some little sign like this). More balks than pickoffs, along with that good of steal success against a lefty, definitely leads you to believe that a runner knows when he's throwing over(this info would be on most scouting reports). They probably haven't seen many teams quite as aggressive as us on the bases. We will probably be doing a bunch of first move stealing...which, if successful, will probably get in his head a bit!
IMO, those numbers don't appear to be anything overly impressive...especially compared to some of their other guys(your definitely right about all the balking and impressive pickoff numbers, just not so much this given pitcher). He's an upperclassman with a chance to step up. Those are always wildcards. Should be interesting to see...