@RoyKim_43_ 
78.3
Velocity (max)
5/21/23
CLASS OF 2027
LHP
1B
Roy
Kim
Great Oak High School (HS) • CA
6' 0" • 191LBS
L/L • 17yr 8mo
Travel Team: JK Select
6' 0" • 191LBS
L/L • 17yr 8mo
Travel Team: JK Select
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
75.8 - 78.1
Velo Range
5/21/23
2132
Spin Rate (avg)
4/16/23
Changeup
70 - 71
Velo Range
5/21/23
1787
Spin Rate (avg)
5/21/23
Curveball
66.9 - 67.7
Velo Range
4/16/23
2555
Spin Rate (avg)
4/16/23
Slider
69.2 - 70
Velo Range
5/21/23
2541
Spin Rate (avg)
4/16/23
Positional Tools
Hitting
Hitting
Pitching
2023
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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).
76.9
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).
2049
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.
26.6
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).
67.3
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).
2555
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
70.3
Changeup
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).
1771
Changeup
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
68.4
Slider
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).
2406
Slider
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
SoCal Rising Stars Game
May 21, 2023
Trackman - Fastball
78.3
Velocity (max)
75.8 - 78.1
Velo Range
75.3
Eff Velocity (avg)
2,112
Spin Rate (max)
2,031
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
70.1
Velocity (max)
69.2 - 70.0
Velo Range
67.6
Eff Velocity (avg)
2,342
Spin Rate (max)
2,305
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - ChangeUp
71.2
Velocity (max)
70.0 - 71.0
Velo Range
68.5
Eff Velocity (avg)
1,820
Spin Rate (max)
1,787
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Rising Stars ID: Inland Empire
Apr 16, 2023
Trackman - Fastball
77.9
Velocity (max)
75.9 - 77.9
Velo Range
77.0
Eff Velocity (avg)
2,175
Spin Rate (max)
2,132
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Curveball
67.8
Velocity (max)
66.9 - 67.7
Velo Range
66.2
Eff Velocity (avg)
2,575
Spin Rate (max)
2,555
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
67.6
Velocity (max)
65.8 - 67.6
Velo Range
65.9
Eff Velocity (avg)
2,616
Spin Rate (max)
2,541
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - ChangeUp
70.9
Velocity (max)
68.9 - 70.8
Velo Range
69.0
Eff Velocity (avg)
1,758
Spin Rate (max)
1,729
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Pitch Scores
2023
Fastball
Hop+
A fastball with hop has a flat approach angle and visually jumps through the zone. When thrown up in the zone, it is more likely to generate a higher swing and miss average. Hop+ of 100 is MLB average.
Fastball
Sink+
A fastball with sink has low backspin and drops through the strike zone. When thrown down in the zone, it is more likely to generate a higher ground ball percentage and lower launch angle. Sink+ of 100 is MLB average.
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
Slider
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Slider
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
Pitching Velos
Game Performance
Vizual Edge
Pitch Ai
Notes
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Comments
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Kim turned in an extended look across 6 innings, allowing 4 runs on 4 hits while striking out 6 and walking 3, with the final line somewhat inflated by a strange sixth inning and questionable calls. The left-hander worked with a three-pitch mix, featuring an 87-89 mph fastball with arm-side run, a 78-81 mph slider with tight shape, and a 78-80 mph changeup that flashed as a true difference-maker. The fastball/changeup combination created consistent tunneling and led to plenty of late swing decisions, with the ability to generate whiffs within the zone. Kim showed a confident, competitive presence throughout the outing, attacking hitters and not backing down in key moments. When dialed in, the changeup played as a wipeout offering, and he consistently competed through traffic. He also flashed strong instincts defensively, making an impressive play on a squeeze attempt — initially charging for a flip home before quickly adjusting, resetting, and firing a strike to first for the out. The overall makeup stands out, with a competitive edge and poise that project well moving forward.