@KaiHirayama_07 85.7
Velocity (max)
10/04/24
CLASS OF 2025
LHP
OF
Kai
Hirayama
Mililani (HS) • HI
5' 10" • 155.6LBS
L/L • 17yr 8mo
Travel Team: Kado Baseball
5' 10" • 155.6LBSL/L • 17yr 8mo
Travel Team: Kado Baseball
Rankings
2025 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
82 - 85.6
Velo Range
10/25/24
2107
Spin Rate (avg)
10/25/24
Changeup
75.3 - 76.6
Velo Range
10/25/24
1550
Spin Rate (avg)
10/04/24
Curveball
-
Velo Range
2358
Spin Rate (avg)
10/04/24
Slider
71.3 - 74.3
Velo Range
10/25/24
2471
Spin Rate (avg)
10/25/24
94.2
Exit Velocity (max)
10/04/24
86.5
Exit Velocity (avg)
10/04/24
352
Distance (max)
10/04/24
64
Sweet Spot %
10/04/24
21.5
Hand Speed (max)
10/04/24
72.5
Bat Speed (max)
10/04/24
14.9
Rot. Acc (max)
10/04/24
36
Hard Hit %
10/04/24
6.98
60-yd
10/04/24
-
30-yd
-
10-yd
-
Run speed (max)
Positional Tools
2024
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
6.98
Power / Speed Score
A simple calculation that divides the athlete’s Exit Velocity Max by the athlete’s 60 Yard Dash time for the given event year. For example, 98 MPH / 7.00s = 14.00.
13.5
Hitting
2024
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
94.2
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
86.5
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
352
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
209
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
15.6
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.
2024 West Coast Games
Oct 4, 2024
Trackman - Hitting
94.2
Exit Velocity (max)
86.5
Exit Velocity (avg)
209
Distance (avg)
352
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2024
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
21.5
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.7
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
72.5
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
69.8
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.
2024 West Coast Games
Oct 4, 2024
Blast - Hitting
21.5
Hand Speed (max)
20.7
Hand Speed (avg)
72.5
Bat Speed (max)
69.8
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2024
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
85.7
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
84.0
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).
2097
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.
25.0
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).
70.9
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).
2358
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).
75.9
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).
1520
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).
72.7
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).
2456
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).
Hawaii Fall Showcase: Powered by Prep Baseball Hawaii
Oct 25, 2024
Trackman - Fastball
85.6
Velocity (max)
82.0 - 85.6
Velo Range
83.2
Eff Velocity (avg)
2,200
Spin Rate (max)
2,107
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
74.9
Velocity (max)
71.3 - 74.3
Velo Range
71.3
Eff Velocity (avg)
2,633
Spin Rate (max)
2,471
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
77.0
Velocity (max)
75.3 - 76.6
Velo Range
75.4
Eff Velocity (avg)
1,687
Spin Rate (max)
1,491
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2024 West Coast Games
Oct 4, 2024
Trackman - Fastball
85.7
Velocity (max)
83.7 - 84.8
Velo Range
82.8
Eff Velocity (avg)
2,188
Spin Rate (max)
2,085
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
70.9
Velocity (max)
69.0
Eff Velocity (avg)
2,358
Spin Rate (max)
2,358
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
74.2
Velocity (max)
71.7 - 73.6
Velo Range
70.7
Eff Velocity (avg)
2,484
Spin Rate (max)
2,422
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
76.8
Velocity (max)
75.4 - 76.3
Velo Range
73.6
Eff Velocity (avg)
1,787
Spin Rate (max)
1,550
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
2024
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
2024
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.
2024
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.08
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
Vizual Edge
2024
Edge Score
The highest Edge Score within the given year. Edge Score is a comprehensive score that takes the core-six visual skills into account, providing an assessment of an athlete’s overall visual ability.
51.95
Pitch Ai
Notes
News
- Hawaii's Most Viewed Profiles - May - Jun 5, 2025
- Hawaii's Most Viewed Profiles - April - Apr 29, 2025
- Hawaii's Most Viewed Profiles - March - Apr 4, 2025
- Unsigned Senior Spotlight: LHP/OF Kai Hirayama - Mar 7, 2025
- 2024 Year in Review: Breaking Ball Spin - Dec 13, 2024
- Hawaii Fall Showcase: Pitching Data Dive - Oct 30, 2024
Comments
Draft Reports
Contact
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Physical
2024
Grip Strgth (LH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (RH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Hirayama is arguably made the most improvement since the spring amongst all 2025's. Velocity is up to 87, CB and CHG plus swing-n-miss weapons and was the most impressive arm on Team Hawaii at West Coast Games with a dominating performance. CB and CHG both flash above-average now and project to future plus. Strike-throwing, K-out pitcher who can start or come in out-of-the-pen as a lefty specialist as LHH's just don't pick him up. One of the youngest in his class, Hirayama just turned 17 and has plus body projection, suggesting plus-plus upside. Hirayama jumps up the list to Prep Baseball Hawaii's #15 ranked 2025 and one of the top Hawaii uncommitted players who could get scooped up by a DI any day now.