The reactive strength index measurement of an athlete's explosiveness by comparing their jump height to the ground contact time in between their jumps. On a scale of 0-5.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
Jonathan Kay: OF, (2026) Mount Hope, RI. 5-foot-8, 150-pound athletic frame. (69.8 mph bat speed average). (20.1 mph hand speed average). Starts in an athletic stance with a quick controlled load, then uses a small leg kick. Bat speed is quick electric, has a short swing plane and high finish. Found lots of barrels with tons of loud contact. Gap to gap approach. Solid capable In the infield, has in control feet, consistent hands, and a clean fluid exchange. Fields the ball out front, movements laterally were athletic. Used a short quick arm action with athletic slot while showing consistent accuracy to the bag.
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Jonathan Kay: OF, (2026) Mount Hope, RI. 5-foot-8, 150-pound athletic frame. (69.8 mph bat speed average). (20.1 mph hand speed average). Starts in an athletic stance with a quick controlled load, then uses a small leg kick. Bat speed is quick electric, has a short swing plane and high finish. Found lots of barrels with tons of loud contact. Gap to gap approach. Solid capable In the infield, has in control feet, consistent hands, and a clean fluid exchange. Fields the ball out front, movements laterally were athletic. Used a short quick arm action with athletic slot while showing consistent accuracy to the bag.