He throws fastball, slider and curve, plus the occasional change. It is dead on the fastball, movement-wise, but a few MPH slower.
Morris' curve, at 8.8 pfx_x, is the 16th biggest sweeper I have in my database. The avearge horizontal spin movement on a curveball is 5.4 in., with a handful of players in double-digits. More on those impressive curveballs later. The real impressive ones are the big 12-to-6 yakkers, like Zito's. Three Cub lefties will show-up on that list.