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.
Will Entner: OF/LHP, (2026) Andover, MA. 5-foot-7, 150-pound slim build. Projectable at the plate, Entner recorded an exit velocity of 80 mph. (67.0 mph bat speed average). (20.7 mph hand speed average). Begins in a balanced athletic stance with a controlled load, then uses a small stride. Bat speed is developing, exhibits a loose uphill swing plane and good extension on his finish. Barreled up some balls with loud contact. Line drive approach. Projectable and athletic in the infield, his best throw was recorded at 74 mph; had athletic developing footwork, a natural exchange, and developing soft hands. Fields the ball out front, movements laterally were developing. Used a high ¾ slot with a consistent arm action while showing consistent accuracy to the base. On the mound, showed a high ¾ arm angle and a consistent arm action with developing arm speed. Up-tempo type pitcher who shows some effort. Sat with his fastball at 75-76 mph; shows running action and command arm side around the zone. (Max spin 1764; Avg 1528). His changeup (66-68) had arm side control and gradual fading action.
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Will Entner: OF/LHP, (2026) Andover, MA. 5-foot-7, 150-pound slim build. Projectable at the plate, Entner recorded an exit velocity of 80 mph. (67.0 mph bat speed average). (20.7 mph hand speed average). Begins in a balanced athletic stance with a controlled load, then uses a small stride. Bat speed is developing, exhibits a loose uphill swing plane and good extension on his finish. Barreled up some balls with loud contact. Line drive approach. Projectable and athletic in the infield, his best throw was recorded at 74 mph; had athletic developing footwork, a natural exchange, and developing soft hands. Fields the ball out front, movements laterally were developing. Used a high ¾ slot with a consistent arm action while showing consistent accuracy to the base. On the mound, showed a high ¾ arm angle and a consistent arm action with developing arm speed. Up-tempo type pitcher who shows some effort. Sat with his fastball at 75-76 mph; shows running action and command arm side around the zone. (Max spin 1764; Avg 1528). His changeup (66-68) had arm side control and gradual fading action.