Originally Posted by klw
Looks like a curve to me. Do you have a GIF of him throwing a fastball? He seems to slow his body during the delivery more than you would for a slider but I would be curious to compare this to his fastball.
I mentioned in another thread (or maybe it was this one) that I thought he had an interesting delivery. "Slow" is one word that comes to mind. Looks like he is just tossing it in there gently, whatever the pitch.