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.
Ashton Arroyo, Marina (CA), 2025 Positional Profile: 1B/RHP Body: 6-6, 185-pounds. XL frame. Long and lean w/ projection. Defense: Average 1B actions. Heavier feet but quality glovework. Average quickness to release on DPs. Arm: RH. INF - 74 mph. Longer arm action at 1B. Accurate throws. Average strength. Hit: RHH. Simple stance. Straight up feet with an upright upper body. Smaller leg lift trigger as hands load back into a slight arm bar. Longer flat path. Some trouble adjusting low. Most barrels were pullside in BP. Average bat speed for level.
Delivery: Side steps into a belt high leg lift. More tall/fall type with minimal sit. Direction works through home. More east/west plane of rotation. Falls to 1B side at finish. Arm Action: RH. Medium arm circle in the back. Releases to a 3/4 slot. Present scap retraction and arm speed. FB: Average command and spin. Present extension allows for extra perceived velo. Flashed some upside up with high IVB. SL: Slower sweeper shape with minimal IVB and average IHM of about 14 inches. CH: Straighter change with minimal IHM. Kills about 6 inches of IVB. Slight push action seen with decrease in extension.
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Ashton Arroyo, Marina (CA), 2025
Positional Profile: 1B/RHP
Body: 6-6, 185-pounds. XL frame. Long and lean w/ projection.
Defense: Average 1B actions. Heavier feet but quality glovework. Average quickness to release on DPs.
Arm: RH. INF - 74 mph. Longer arm action at 1B. Accurate throws. Average strength.
Hit: RHH. Simple stance. Straight up feet with an upright upper body. Smaller leg lift trigger as hands load back into a slight arm bar. Longer flat path. Some trouble adjusting low. Most barrels were pullside in BP. Average bat speed for level.
Delivery: Side steps into a belt high leg lift. More tall/fall type with minimal sit. Direction works through home. More east/west plane of rotation. Falls to 1B side at finish.
Arm Action: RH. Medium arm circle in the back. Releases to a 3/4 slot. Present scap retraction and arm speed.
FB: Average command and spin. Present extension allows for extra perceived velo. Flashed some upside up with high IVB.
SL: Slower sweeper shape with minimal IVB and average IHM of about 14 inches.
CH: Straighter change with minimal IHM. Kills about 6 inches of IVB. Slight push action seen with decrease in extension.