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.
The maximum speed, in the direction of home plate, that the wrist is traveling. Measured in meters per second (m/s)
Arm Slot
Angle of the forearm relative to the ground between maximum external rotation (MER) and ball release (BR). Which can be a powerful player comparison metric, delivered in degrees.
Knee Extension Velo
The angular velocity of the front knee straightening after foot plant, which provides indicators of velocity potential. Measured in degrees per second.
Deception
The amount of time that the ball is visible to the hitter, after the instant of front foot strike. Measures in milliseconds.
Hip-Shoulder Separation
The difference in angle of between the hips and shoulders, occurring close to the foot plant. Measured in degrees.
Jack Gerardi, Santa Fe Christian (CA), 2025 Positional Profile: CINF/P Body: 6-3, 190-pounds. Larger frame. Present physicality. Room to add. Defense: Fundamental footwork. Displays glove early. Quick exchange. Good around the bag. Gets to release quick on DPs. Arm: RH. INF - 77 mph. Short and quick on DP turns. Present accuracy. Above average strength. Hit: RHH. Wider even base with loose hands in stance. Simple forward stride. Hands pullback with some present coil and load into a barrel tip early connection point. Level swing path (83% on-plane efficiency). More LDs than GBs/FBs in his BP round. Average bat speed. Balanced swing. LD knock during game action. Delivery: Athletic delivery. Side steps into a chest high knee tuck. Some present drop/drive. Maintains flexion in backleg. Shoulders stay above the hips. Still head. Works in-line. Arm Action: RH. Medium arm path. Slight scap load in the back. Works to a 3/4 slot. Present arm speed. Maintains arm speed and slots on all pitch types. FB: Avg. spin. Tendency to miss up. Average movement profile. CB: Slurvy shape. Shorter breaker from a movement profile. Present feel in-zone. SL: Straight change. Kills some spin. Similar movement profile to FB.
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Jack Gerardi, Santa Fe Christian (CA), 2025
Positional Profile: CINF/P
Body: 6-3, 190-pounds. Larger frame. Present physicality. Room to add.
Defense: Fundamental footwork. Displays glove early. Quick exchange. Good around the bag. Gets to release quick on DPs.
Arm: RH. INF - 77 mph. Short and quick on DP turns. Present accuracy. Above average strength.
Hit: RHH. Wider even base with loose hands in stance. Simple forward stride. Hands pullback with some present coil and load into a barrel tip early connection point. Level swing path (83% on-plane efficiency). More LDs than GBs/FBs in his BP round. Average bat speed. Balanced swing. LD knock during game action.
Delivery: Athletic delivery. Side steps into a chest high knee tuck. Some present drop/drive. Maintains flexion in backleg. Shoulders stay above the hips. Still head. Works in-line.
Arm Action: RH. Medium arm path. Slight scap load in the back. Works to a 3/4 slot. Present arm speed. Maintains arm speed and slots on all pitch types.
FB: Avg. spin. Tendency to miss up. Average movement profile.
CB: Slurvy shape. Shorter breaker from a movement profile. Present feel in-zone.
SL: Straight change. Kills some spin. Similar movement profile to FB.