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Diaz is a prep righthander with a strong 6-foot-2 frame and thick lower half. His arm action gets a bit long in the back, but has good strength and a quick delivery from a slot that allows him to manipulate the ball for more sink and run. Diaz’s fastball has topped out at 94 mph at his best and throws a slider as well. Diaz has struggled at times this spring and will need to improve his control at the next level. His arm flies out at times and he has a noticeable wrist wrap in the back of his arm stroke and a head whack through his finish. He’ll need to better incorporate his lower half and smooth out some of the kinks in his delivery to take advantage of a fast, but erratic arm. Diaz is committed to Miami.