You're right, wasn't as good as I thought.
I think what I meant more so were his L/R splits, from when I remember following him. And his amazingly low hit rates.
Look at his 2012-2013 combined, including fallball, 200IP, 148 hits, that's pretty impressive.
Versus lefties in 2012, 46IP 15H 57K. The potential is/was obviously always there.