The fastball was used prominently, touching 96 a few times and having some nice tailing action on it. The change-up didn't have a lot of movement, and Arrieta might want to get just a little bit more separation, velocity-wise, from the heater. He did do a nice job keeping it down in the zone pretty well, and got a few swings and misses on it. Looks like he had good arm action with it. Jake threw two breaking balls: a slider with good bite what he kept mostly at the knees or below, and with which he was able to generate several whiffs; and a big breaking curveball. It's a nice repertoire, and if he can command it then he should be able to have some success. That "if" is the issue though.