82.1
Velocity (max)
3/18/23
CLASS OF 2025
LHP
OF
Jack
Perkowski
Hartford (HS) • WI
5' 10" • 170LBS
R/L • 17yr 6mo
Travel Team: Brew State Baseball Academy
5' 10" • 170LBS
R/L • 17yr 6mo
Travel Team: Brew State Baseball Academy
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
80.7 - 82.1
Velo Range
3/18/23
1949
Spin Rate (avg)
3/18/23
Changeup
72 - 74.5
Velo Range
3/18/23
1558
Spin Rate (avg)
3/18/23
Slider
69.7 - 72.5
Velo Range
3/18/23
2414
Spin Rate (avg)
3/18/23
88.9
Exit Velocity (max)
3/18/23
81.8
Exit Velocity (avg)
3/18/23
327
Distance (max)
3/18/23
55
Sweet Spot %
3/18/23
21.9
Hand Speed (max)
3/18/23
73.4
Bat Speed (max)
3/18/23
16.2
Rot. Acc (max)
3/18/23
-
Hard Hit %
7.16
60
3/18/23
-
30-yd
1.73
10-yd
3/18/23
18.8
Run speed (max)
3/18/23
-
INF Velo
83
OF Velo
3/18/23
-
C Velo
-
Pop Time
Positional Tools
2023
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.16
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
83.0
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.
12.4
Hitting
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
88.9
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
81.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
327
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
177
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
14.6
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.
Milwaukee Preseason ID
Mar 18, 2023
Trackman - Hitting
88.9
Exit Velocity (max)
81.8
Exit Velocity (avg)
177
Distance (avg)
327
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2023
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
21.9
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
21.2
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
73.4
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
71.6
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.
Milwaukee Preseason ID
Mar 18, 2023
Blast - Hitting
21.9
Hand Speed (max)
21.2
Hand Speed (avg)
73.4
Bat Speed (max)
71.6
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.1
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
81.4
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).
1949
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.
23.9
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
73.3
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).
1558
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).
71.1
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).
2414
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).
Milwaukee Preseason ID
Mar 18, 2023
Trackman - Fastball
82.1
Velocity (max)
80.7 - 82.1
Velo Range
79.1
Eff Velocity (avg)
2,120
Spin Rate (max)
1,949
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
72.6
Velocity (max)
69.7 - 72.5
Velo Range
68.6
Eff Velocity (avg)
2,512
Spin Rate (max)
2,414
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
74.5
Velocity (max)
72.0 - 74.5
Velo Range
71.1
Eff Velocity (avg)
1,665
Spin Rate (max)
1,558
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
2023
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
80.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.0
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
69.5
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
77.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
71.0
Game Performance
2023
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.73
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.16
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.
Milwaukee Preseason ID
Mar 18, 2023
Swift
1.73
10-yd
7.16
60-yd
18.8
Run speed (max)
1.79
RSi (max)
1.79
RSi (avg)
830
Jump Power (max)
Visual Edge
2023
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.
70.22
Pitch Ai
Notes
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Comments
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Positional Profile: LHP/OF
Body: 5-10, 170-pounds. Athletic, projectable frame.
Hit: RHH. Stock set up, slightly open with relaxed hands. Gathers back, lands centered with hands in strong hitting position, quickness to hands with bat speed, shows ability to drive balls to both gaps with back spin.
Power: 89 max exit velocity, averaged 81.8 mph. 327’ max distance.
Arm: LH. OF - 83 mph. Compact, 3/4 slot.
Defense: One-hand gather, shoulders stay on plane, works on-line.
Run: 7.16 runner in the 60.
Delivery: Medium leg lift into tall and fall. Closed stride.
Arm Action: LH. Stab back with hand tuck.
FB: T82, 81-82 mph. Arm side life. T2120, 1949 average rpm.
SL: 70-72 mph. Sweeping action. T2512, 2414 average rpm.
CH: 72-74 mph. Downer action with some feel. T1665, 1558 average rpm.