20.8
Hand Speed (max)
10/01/22
CLASS OF 2026
OF
LHP
JJ
Robinson
Clayton Valley Charter (HS) • CA
5' 11" • 165LBS
L/L • 16yr 1mo
Travel Team: Lamorinda Arsenal
5' 11" • 165LBS
L/L • 16yr 1mo
Travel Team: Lamorinda Arsenal
Rankings
2026 National
Rankings available to Premium Subscriber
2026 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
68.8
Bat Speed (max)
10/01/22
20.3
Rot. Acc (max)
10/01/22
-
Hard Hit %
88.4
Exit Velocity (max)
10/01/22
81.1
Exit Velocity (avg)
10/01/22
312
Distance (max)
10/01/22
63
Sweet Spot %
10/01/22
7.75
60
10/01/22
4.28
30-yd
10/01/22
1.85
10-yd
10/01/22
17.7
Run speed (max)
10/01/22
-
INF Velo
79
OF Velo
10/01/22
-
C Velo
-
Pop Time
Fastball
78.3
Velocity (max)
10/01/22
74.3 - 77.4
Velo Range
10/01/22
1942
Spin Rate (avg)
10/01/22
Curveball
63.1 - 63.6
Velo Range
10/01/22
1855
Spin Rate (avg)
10/01/22
Positional Tools
2022
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Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
79.0
Hitting
2022
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
88.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
81.1
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
312
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
215
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
23.6
Hard Hit %
Percentage of batted balls with exit velocities over 95 MPH in the given event year.
Sweet Spot %
Percentage of batted balls in the given event year with a launch angle between 8° and 32°.
Line Drive %
Percentage of batted balls with launch angles between 10 and 25 degrees in the given event year.
Fly Ball %
Percentage of batted balls with launch angles between 25 and 50 degrees in the given event year.
Ground Ball %
Percentage of batted balls with launch angles below 10 degrees in the given event year.
NorCal Underclass Game
Oct 1, 2022
Trackman - Hitting
88.4
Exit Velocity (max)
81.1
Exit Velocity (avg)
215
Distance (avg)
312
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2022
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
20.8
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
19.8
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
68.8
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
63.9
Rotational Acceleration Max
The highest Rotational Acceleration of any swing in the given event year.
Rotational Acceleration Avg
The average Rotational Acceleration for all swings in the given event year.
On-Plane Efficiency Max
The highest On-Plane Efficiency of any swing in the given event year.
On-Plane Efficiency Avg
The average On-Plane Efficiency for all swings in the given event year.
NorCal Underclass Game
Oct 1, 2022
Blast - Hitting
20.8
Hand Speed (max)
19.8
Hand Speed (avg)
68.8
Bat Speed (max)
63.9
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
78.3
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
75.8
Fastball
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
1942
Fastball
Spin Score Avg
The average Bauer Units value of all fastballs in the given event year. Bauer Units are calculated for each pitch by dividing Spin Rate by Velocity.
25.6
Fastball
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
63.4
Curveball
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
1855
Curveball
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
NorCal Underclass Game
Oct 1, 2022
Trackman - Fastball
78.3
Velocity (max)
74.3 - 77.4
Velo Range
73.1
Eff Velocity (avg)
2,105
Spin Rate (max)
1,942
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Curveball
63.6
Velocity (max)
63.1 - 63.6
Velo Range
60.2
Eff Velocity (avg)
1,912
Spin Rate (max)
1,855
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Pitch Scores
2022
Fastball
Rise+
A fastball with rise has a high percentage of backspin. When thrown up in the zone, it is more likely to generate a higher fly ball percentage. Rise+ of 100 is MLB average
Pitching Velos
Game Performance
2024
2022
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.85
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.28
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.75
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.85
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.28
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.75
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
RSi
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.
NorCal Underclass Game
Oct 1, 2022
Swift
1.85
10-yd
4.28
30-yd
7.75
60-yd
17.7
Run speed (max)
0.68
RSi (max)
0.90
RSi (avg)
1,091
Jump Power (max)
19.8
Jump Height (max)
19.5
Jump Height (avg)
Visual Edge
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
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Event: NorCal Underclass Game
Positional Profile: OF/LHP
Physical: 5-11, 165-pounds; Lean strength on well-proportioned body; 7.75 60-yard, 19.8” max jump height.
Offensively: LHH. EV max – 88.4 mph, hand speed max – 20.8 mph, bat speed max – 68.8 mph; Feet just outside shoulders in slightly closed stance, slight knee pinch, vertical barrel, reverse knee lift before getting out to medium stride, high back elbow to start, oppo approach, ability to serve ball the other way, fairly short to ball, handsy swing, confident presence.
Defensively: OF mph – 79; Some tailing action on the throws, athletic approach, clean fielding mechanics with direct angles.
Delivery: From stretch, calm slower lift to just above waist, slightly open stride, creates stable front side leverage, slight rotation through to 3B side at release, stability with body control, front side is disciplined.
Arm Action: Compact pocket path on backside, high-3/4 release, accelerates quickly from peak of arm stroke, repeatable delivery and arm action.
FB: T78.3 mph, 74-77 mph velo range, 2105 max spin; Big arm side run, showed ability to jam LHH and get RHH to expand as ball ran away, open stride helps to create some distraction for RHH when he locates on the arm side.
CB: 63-64 mph, 1912 max spin; Slippery and big, two plane sweeping break, smooth action, can present the pitch as a potential strike and start bats as the ball sweeps away.