@JonathanSlisz 87
Velocity (max)
2/15/25
CLASS OF 2027
LHP
1B
Johnny
Slisz
Aurora High School (HS) • OH
5' 11" • 170LBS
L/L • 16yr 1mo
Travel Team: Release
5' 11" • 170LBS
L/L • 16yr 1mo
Travel Team: Release
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
Player has made a commitment?
Tell us where
Best Of Stats
Fastball
82.3 - 86.3
Velo Range
2/15/25
1812
Spin Rate (avg)
2/15/25
Changeup
76.1 - 77.4
Velo Range
2/15/25
1605
Spin Rate (avg)
2/15/25
Curveball
68 - 72.3
Velo Range
2/15/25
2232
Spin Rate (avg)
2/15/25
Positional Tools
Hitting
Hitting
Pitching
2025
Sign in to view rankings 
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
86.6
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
84.3
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).
1812
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.
21.5
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).
70.1
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).
2232
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).
76.7
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).
1605
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).
Scout Day: Release Baseball 2.15.25
Feb 15, 2025
Trackman - Fastball
86.6
Velocity (max)
82.3 - 86.3
Velo Range
84.2
Eff Velocity (avg)
2,069
Spin Rate (max)
1,812
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
72.7
Velocity (max)
68.0 - 72.3
Velo Range
69.4
Eff Velocity (avg)
2,300
Spin Rate (max)
2,232
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
77.4
Velocity (max)
76.1 - 77.4
Velo Range
77.0
Eff Velocity (avg)
1,750
Spin Rate (max)
1,605
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
Pitching Velos
2025
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
87.0
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
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
70.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.5
Game Performance
Vizual Edge
Pitch Ai
Notes
Comments
Draft Reports
Contact
Premium Content Area
To unlock contact information, you need to purchase a ScoutPLUS subscription.
Purchase Subscription OR
Login
Positional Profile: LHP/1B
Body: 5-11, 170-pounds.
Arm Action: LH
FB: T87, 82-86 mph. T2069, 1812 average rpm.
CB: 68-72 mph. T2300, 2232 average rpm.
CH: 76-77 mph. T1750, 1605 average rpm.
Positional Profile: LHP/1B
Body: 5-11, 170-pounds.
Hit: LHH
Arm: LH.