Kiley McDaniel has an interesting report about Gerrit Cole from September instructs. Here are some quotes (to pad out the word limit because no one would ever see this as a FanShot):

Cole only went two innings but put up the big numbers on the radar gun you hope to see. He was 96-99 in the first inning, hitting a 101 and then sitting a paltry 96-98 in the second inning.

It’s amazing how good Cole is at keeping his arm in sync with his body.... Cole has a true 80 fastball but he doesn’t cheat at all—his arm starts exploding when his hips do, he takes a direct path to home plate, his elbow stays low relative to his shoulder at foot plant, he has only slight head movement and good posture at release, a solid front side, an arm that works well out front all with good enough balance to not spin off to first base.

In instructs, Cole’s stride was shorter [than in May] and he consistently got over his front leg. This allows him to control his body better and have an easier time getting the ball down in the zone. His power fastball with lively movement should be a groundball machine and break bats left and right, which I think he’ll be doing more in 2013.

Good stuff to read!