I don't have a GIF in front of me, but his slider again last night again was very slow, as compared to his (plus) fastball. I charted three or four that were 15 or so mph slower than his fastball. His change wasn't quite as good, as his arm speed slowed enough to make it fairly obvious he was throwing something off-speed.
One thing I'd be interested in others discussing is his cut fastball. I think he's throwing a four-seamer a lot more this year, and the cutter is his true "out" pitch at around 89-91. That's the pitch that he has good movement on and great control of.
"You can learn little from victory. You can learn everything from defeat."
-- Christy Matthewson
"Show me a good loser and I'll show you an idiot."
-- Leo Durocher