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.
Yohnelix Arroyo: OF/SS, (2026) Civic High School, CT. 5-foot-6, 145-pound lean athletic frame. Projectable athletic during batting practice, the right-handed hitter displayed an exit velocity of 82 mph, Highest at the event. (61.8 mph bat speed average). (21.0 mph hand speed average). Begins in an athletic balanced stance with a tight compact load, then uses a small stride. Bat speed is electric, uses a short simple swing plane and good extension on his finish. Found some barrels with loud contact. Gap to gap line drive approach. Smooth athletic in the outfield, his throws to the bases were maxed out at 75 mph; had twitchy hands, athletic quick footwork, and a clean exchange. Fields the ball out front to the side, movements laterally were quick. Used a high ¾ slot with a short quick arm action.
Exit Velocity: 82 mph
Arm Velocity: 75 mph
30-Yard Dash: 4.05
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Yohnelix Arroyo: OF/SS, (2026) Civic High School, CT. 5-foot-6, 145-pound lean athletic frame. Projectable athletic during batting practice, the right-handed hitter displayed an exit velocity of 82 mph, Highest at the event. (61.8 mph bat speed average). (21.0 mph hand speed average). Begins in an athletic balanced stance with a tight compact load, then uses a small stride. Bat speed is electric, uses a short simple swing plane and good extension on his finish. Found some barrels with loud contact. Gap to gap line drive approach. Smooth athletic in the outfield, his throws to the bases were maxed out at 75 mph; had twitchy hands, athletic quick footwork, and a clean exchange. Fields the ball out front to the side, movements laterally were quick. Used a high ¾ slot with a short quick arm action.
Exit Velocity: 82 mph
Arm Velocity: 75 mph
30-Yard Dash: 4.05