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.
Sean Szilva: C/OF, (2025) North Quincy, MA. 5-foot-7, 150-pound lean athletic build. Capable in the box, the right-handed hitter clocked an exit velocity of 83 mph. (59.9 mph bat speed average). (19.3 mph hand speed average). Started in a balanced wide stance with a controlled load, then used a small stride. Bat speed is developing, shows a long flat swing plane and good extension on his finish. Found some barrels with loud contact. Aggressive approach. Capable from the outfield, his best throws to the bases were registered at 76 mph; showed developing soft hands, developing consistent feet, and a natural exchange. Fields the ball out front, movements laterally were developing. While catching, he recorded a position velocity of 72 mph during throw downs; has soft developing hands, developing consistent feet, and a natural transfer. Clean setup. Showed a high ¾ slot with consistent accuracy to the bag.
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Sean Szilva: C/OF, (2025) North Quincy, MA. 5-foot-7, 150-pound lean athletic build. Capable in the box, the right-handed hitter clocked an exit velocity of 83 mph. (59.9 mph bat speed average). (19.3 mph hand speed average). Started in a balanced wide stance with a controlled load, then used a small stride. Bat speed is developing, shows a long flat swing plane and good extension on his finish. Found some barrels with loud contact. Aggressive approach. Capable from the outfield, his best throws to the bases were registered at 76 mph; showed developing soft hands, developing consistent feet, and a natural exchange. Fields the ball out front, movements laterally were developing. While catching, he recorded a position velocity of 72 mph during throw downs; has soft developing hands, developing consistent feet, and a natural transfer. Clean setup. Showed a high ¾ slot with consistent accuracy to the bag.