63.2
Velocity (max)
3/29/26
CLASS OF 2031
RHP
3B
William
Sapolu
Punahou (HS) • HI
5' 6" • 160.3LBS
R/R • 12yr 10mo
Travel Team: KR Rebels
5' 6" • 160.3LBSR/R • 12yr 10mo
Travel Team: KR Rebels
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
61 - 63.2
Velo Range
3/29/26
1418
Spin Rate (avg)
3/29/26
Changeup
53.9 - 56.5
Velo Range
3/29/26
1036
Spin Rate (avg)
3/29/26
Curveball
51.3 - 53.6
Velo Range
3/29/26
1466
Spin Rate (avg)
3/29/26
Positional Tools
Hitting
Hitting
Pitching
2026
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Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
63.2
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
62.2
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).
1418
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.
22.8
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).
52.4
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).
1466
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).
55.6
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).
1036
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).
Hawaii Rising Stars ID (SOLD OUT)
Mar 29, 2026
Trackman - Fastball
63.2
Velocity (max)
61.0 - 63.2
Velo Range
61.7
Eff Velocity (avg)
1,520
Spin Rate (max)
1,418
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
54.1
Velocity (max)
51.3 - 53.6
Velo Range
51.3
Eff Velocity (avg)
1,560
Spin Rate (max)
1,466
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
56.5
Velocity (max)
53.9 - 56.5
Velo Range
54.2
Eff Velocity (avg)
1,075
Spin Rate (max)
1,036
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Pitch Scores
Pitching Velos
Game Performance
Vizual Edge
Pitch Ai
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