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.
Caleb Altman: C/3B, (2026) Hopkinton High School, MA. 5-foot-6, 145-pound slim frame. Projectable and athletic at the plate, Altman had an exit velocity of 83 mph. (66.7 mph bat speed average). (21.3 mph hand speed average). Began in a balanced athletic stance with a small load, then used a controlled stride. Bat speed is quick, displays a short swing plane and balanced finish. Found multiple barrels with loud contact. Line drive approach. Athletic in the infield, displayed a velocity of 67 mph; has developing consistent feet, a clean exchange, and developing consistent hands. Uses his glove out front. Behind the plate, his best recorded velocity during throw downs was clocked at 64 mph; has developing soft hands, developing athletic feet, and a clean transfer. Used a high ¾ slot with a loose short arm action while showing consistent accuracy to the bag. (Max spin ; Avg ).
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Caleb Altman: C/3B, (2026) Hopkinton High School, MA. 5-foot-6, 145-pound slim frame. Projectable and athletic at the plate, Altman had an exit velocity of 83 mph. (66.7 mph bat speed average). (21.3 mph hand speed average). Began in a balanced athletic stance with a small load, then used a controlled stride. Bat speed is quick, displays a short swing plane and balanced finish. Found multiple barrels with loud contact. Line drive approach. Athletic in the infield, displayed a velocity of 67 mph; has developing consistent feet, a clean exchange, and developing consistent hands. Uses his glove out front. Behind the plate, his best recorded velocity during throw downs was clocked at 64 mph; has developing soft hands, developing athletic feet, and a clean transfer. Used a high ¾ slot with a loose short arm action while showing consistent accuracy to the bag. (Max spin ; Avg ).