@KaiPrinss7 89
Velocity (max)
2/16/26
CLASS OF 2027
RHP
Kai
Prinss
Humberside Collegiate Institute (HS) • ON
6' 1" • 185LBS
L/R • 17yr 5mo
Travel Team: Ontario Blue Jays
6' 1" • 185LBS
L/R • 17yr 5mo
Travel Team: Ontario Blue Jays
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
86.8 - 88.6
Velo Range
2/16/26
2337
Spin Rate (avg)
2/16/26
Changeup
63.7 - 66.3
Velo Range
9/26/23
1928
Spin Rate (avg)
9/26/23
Curveball
76.3 - 77
Velo Range
2/16/26
2875
Spin Rate (avg)
2/16/26
Slider
75.8 - 80.3
Velo Range
8/12/26
2826
Spin Rate (avg)
9/30/25
95.5
Exit Velocity (max)
9/30/25
84.7
Exit Velocity (avg)
9/30/25
310
Distance (max)
9/30/25
67
Sweet Spot %
9/30/25
-
Hand Speed (max)
-
Bat Speed (max)
-
Rot. Acc (max)
42
Hard Hit %
9/30/25
7.62
60-yd
9/26/23
4.08
30-yd
9/30/25
1.75
10-yd
9/30/25
17.6
Run speed (max)
9/26/23
70
INF Velo
9/26/23
89
OF Velo
9/30/25
-
C Velo
-
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Positional Tools
2025
2023
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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).
89.0
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
70.0
Hitting
2025
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
95.5
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
84.7
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
310
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
178
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
17.1193
Hard Hit %
Percentage of batted balls with exit velocities over 90 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.
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
77.3
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
68.5
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
264
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
185
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
23.4338
Hard Hit %
Percentage of batted balls with exit velocities over 90 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.
2025 Team Ontario Astros Scout Day
Sep 30, 2025
Trackman - Hitting
95.5
Exit Velocity (max)
84.7
Exit Velocity (avg)
178
Distance (avg)
310
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
2023 Leaside Leafs Scout Day
Sep 26, 2023
Trackman - Hitting
77.3
Exit Velocity (max)
68.5
Exit Velocity (avg)
185
Distance (avg)
264
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
Pitching
2026
2025
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
89.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
85.7
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).
2223
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.
25.9
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).
76.7
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).
2875
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
77.9
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).
2630
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).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
87.8
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
86.2
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).
2274
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.
26.4
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).
73.3
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).
2760
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
77.0
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).
2826
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).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
72.2
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
71.1
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).
1834
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.
25.8
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
64.9
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).
1928
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).
62.9
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).
2363
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).
2026 Ontario Top Prospect Games - Session 1 (Invite Only)
Aug 12, 2026
Trackman - Fastball
88.4
Velocity (max)
83.6 - 86.7
Velo Range
84.4
Eff Velocity (avg)
2,367
Spin Rate (max)
2,190
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
80.8
Velocity (max)
75.8 - 80.3
Velo Range
76.7
Eff Velocity (avg)
2,719
Spin Rate (max)
2,547
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2026 Ontario Preseason Invitational
Feb 16, 2026
Trackman - Fastball
89.0
Velocity (max)
86.8 - 88.6
Velo Range
91.4
Eff Velocity (avg)
2,405
Spin Rate (max)
2,337
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
77.3
Velocity (max)
76.3 - 77.0
Velo Range
78.9
Eff Velocity (avg)
3,025
Spin Rate (max)
2,875
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
79.9
Velocity (max)
75.5 - 79.7
Velo Range
79.2
Eff Velocity (avg)
2,813
Spin Rate (max)
2,770
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2025 Team Ontario Astros Scout Day
Sep 30, 2025
Trackman - Fastball
87.8
Velocity (max)
85.3 - 87.1
Velo Range
84.9
Eff Velocity (avg)
2,378
Spin Rate (max)
2,274
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
74.0
Velocity (max)
72.8 - 73.9
Velo Range
71.4
Eff Velocity (avg)
2,782
Spin Rate (max)
2,760
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
77.9
Velocity (max)
76.2 - 77.8
Velo Range
73.8
Eff Velocity (avg)
2,927
Spin Rate (max)
2,826
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2023 Leaside Leafs Scout Day
Sep 26, 2023
Trackman - Fastball
72.2
Velocity (max)
70.3 - 72.0
Velo Range
69.1
Eff Velocity (avg)
1,887
Spin Rate (max)
1,834
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
64.0
Velocity (max)
62.2 - 63.7
Velo Range
61.2
Eff Velocity (avg)
2,447
Spin Rate (max)
2,363
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
66.4
Velocity (max)
63.7 - 66.3
Velo Range
63.8
Eff Velocity (avg)
1,964
Spin Rate (max)
1,928
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
2026
2025
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.
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
Pitching Velos
Game Performance
2023
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.75
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.13
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.62
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
2025
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.75
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.08
Vizual Edge
Pitch Ai
Notes
News
- Top Prospect Games: Pitching Data Dive - Aug 14, 2026
- Top Prospect Games: Statistical Analysis - Aug 13, 2026
- Ontario Preseason Showcase Standouts - Mar 24, 2026
- Ontario Preseason Invitational: Pitching Data Dive - Feb 18, 2026
- Ontario Preseason Invitational: Statistical Analysis - Feb 17, 2026
- Team Ontario Astros Scout Day: Statistical Analysis - Oct 2, 2025
Comments
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2026 Ontario Preseason Invitational
Kai Prinss, Team Ontario Astros, 2027 (No. 28) Uncommitted
Positional Profile: RHP
Body: 6-1, 180-pounds.
Fastball: 87-89mph, 2337rpm (T2405), 17.1” IVB, 3.5” HB, 33% Strike%.
Curveball: 76-77mph, 2875rpm (T3025), -8.2” IVB, -12.3” HB.
Slider: 76-80mph, 2770rpm (T2813), -4.5” IVB, -12.4” HB, 33% Strike%.