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 Drzewiczewski: 2B/OF, (2024) St. John's Prep, MA. 5-foot-9, 161-pound lean athletic frame. Projectable and athletic during batting practice, Drzewiczewski had a max exit velocity of 88 mph. (65.7 mph bat speed average). (19.4 mph hand speed average). Began in a balanced athletic stance with a controlled load, then used a small stride. Bat speed is developing, exhibits a loose uphill swing plane and good extension on his finish. Barreled up multiple balls with loud contact. Gap to gap aggressive approach. Capable while in the infield, made throws at velocities up to 71 mph; has a natural exchange, developing athletic feet, and developing soft hands. Fields the ball out front, movements laterally were developing. Had consistent accuracy to the base and a high ¾ slot. (Max spin ; Avg ).
12/07/19
5-foot-1, 100-pound left-handed hitting middle infielder and catcher. He also pitched at the event. The approach in the infield is appropriate, as the feet remain active and he stays through the ball. Threw 57 mph across the diamond. Behind the plate, threw 58 mph down to second base. The bat has a tee exit velocity of 64 mph. The setup is wide in base, front foot closed off to start. The path to contact is long to the ball. On the mound, the fastball sat 58 mph, The delivery is online with the feet and the slot is 3/4. The arm works, direction to the plate needs to improve as he matures.
Tee Exit Velocity- 64 mph
INF Velocity- 57 mph
Catching Velocity- 58 mph
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Sean Drzewiczewski: 2B/OF, (2024) St. John's Prep, MA. 5-foot-9, 161-pound lean athletic frame. Projectable and athletic during batting practice, Drzewiczewski had a max exit velocity of 88 mph. (65.7 mph bat speed average). (19.4 mph hand speed average). Began in a balanced athletic stance with a controlled load, then used a small stride. Bat speed is developing, exhibits a loose uphill swing plane and good extension on his finish. Barreled up multiple balls with loud contact. Gap to gap aggressive approach. Capable while in the infield, made throws at velocities up to 71 mph; has a natural exchange, developing athletic feet, and developing soft hands. Fields the ball out front, movements laterally were developing. Had consistent accuracy to the base and a high ¾ slot. (Max spin ; Avg ).
5-foot-1, 100-pound left-handed hitting middle infielder and catcher. He also pitched at the event. The approach in the infield is appropriate, as the feet remain active and he stays through the ball. Threw 57 mph across the diamond. Behind the plate, threw 58 mph down to second base. The bat has a tee exit velocity of 64 mph. The setup is wide in base, front foot closed off to start. The path to contact is long to the ball. On the mound, the fastball sat 58 mph, The delivery is online with the feet and the slot is 3/4. The arm works, direction to the plate needs to improve as he matures.
Tee Exit Velocity- 64 mph
INF Velocity- 57 mph
Catching Velocity- 58 mph