Don’s Thoughts: A product of Puerto Rico, Jose Rivera displays a smooth, easy action delivery on a smaller frame, and he could fill out a bit more which would improve his arsenal. He showcases a decent fastball that could improve with some with a heavier drive towards the plate and de-emphasis the slight sweep action drift.
His change up shows some promise and has some late tailing action and he has a workable 12/6 curveball that needs some refinement. He is rather raw overall, but has the makings for three solid pitches. With a bit more lower half growth, lower half strength, and refined mechanics that utilize the entire body in the delivery, he could show a bit more power behind all three pitches.