87
Velocity (max)
3/06/25
CLASS OF 2026
RHP
SS
Jon
Roessel
Fairport High School (HS) • NY
6' 1" • 185LBS
S/R • 17yr 6mo
Travel Team: Diamond Pro National
6' 1" • 185LBS
S/R • 17yr 6mo
Travel Team: Diamond Pro National
Rankings
2026 National
Rankings available to Premium Subscriber
2026 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
85.3 - 86.4
Velo Range
3/06/25
2274
Spin Rate (avg)
3/06/25
Changeup
77 - 77.1
Velo Range
3/06/25
2032
Spin Rate (avg)
3/06/25
Curveball
65 - 67
Velo Range
7/22/22
-
Spin Rate (avg)
Slider
73.5 - 77.4
Velo Range
3/06/25
2245
Spin Rate (avg)
2/29/24
91.2
Exit Velocity (max)
3/06/25
82.9
Exit Velocity (avg)
3/06/25
304
Distance (max)
3/06/25
36
Sweet Spot %
3/06/25
22
Hand Speed (max)
2/29/24
69
Bat Speed (max)
3/06/25
14.4
Rot. Acc (max)
3/06/25
9
Hard Hit %
3/06/25
-
60-yd
3.90
30-yd
3/06/25
-
10-yd
15.6
Run speed (max)
2/29/24
86
INF Velo
2/29/24
-
OF Velo
-
C Velo
-
Pop Time
Positional Tools
2025
2024
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Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
78.0
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
86.0
Hitting
2025
2024
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
91.2
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
82.9
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
304
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
242
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
30.0119
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.
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
86.6
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
79.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
298
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
188
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
18.4
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.
2025 Diamond Pro Scout Day
Mar 6, 2025
Trackman - Hitting
91.2
Exit Velocity (max)
82.9
Exit Velocity (avg)
242
Distance (avg)
304
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
2024 Diamond Pro Scout Day
Feb 29, 2024
Trackman - Hitting
86.6
Exit Velocity (max)
79.8
Exit Velocity (avg)
188
Distance (avg)
298
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2025
2024
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
20.1
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
19.1
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
69.0
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
66.8
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.
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
22.0
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.5
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
65.0
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
62.0
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.
2025 Diamond Pro Scout Day
Mar 6, 2025
Blast - Hitting
20.1
Hand Speed (max)
19.1
Hand Speed (avg)
69.0
Bat Speed (max)
66.8
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
2024 Diamond Pro Scout Day
Feb 29, 2024
Blast - Hitting
22.0
Hand Speed (max)
20.5
Hand Speed (avg)
65.0
Bat Speed (max)
62.0
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2025
2024
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
86.5
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
85.8
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.
26.5
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
77.1
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).
2032
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).
75.3
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).
2217
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).
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).
84.4
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).
2074
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.
24.6
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).
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).
1699
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).
75.2
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).
2245
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).
2025 Diamond Pro Scout Day
Mar 6, 2025
Trackman - Fastball
86.5
Velocity (max)
85.3 - 86.4
Velo Range
84.2
Eff Velocity (avg)
2,360
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 - Slider
77.7
Velocity (max)
73.5 - 77.4
Velo Range
74.1
Eff Velocity (avg)
2,423
Spin Rate (max)
2,217
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
77.1
Velocity (max)
77.0 - 77.1
Velo Range
76.1
Eff Velocity (avg)
2,128
Spin Rate (max)
2,032
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2024 Diamond Pro Scout Day
Feb 29, 2024
Trackman - Fastball
85.7
Velocity (max)
83.6 - 85.3
Velo Range
83.3
Eff Velocity (avg)
2,154
Spin Rate (max)
2,074
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
76.1
Velocity (max)
74.5 - 76.0
Velo Range
72.7
Eff Velocity (avg)
2,460
Spin Rate (max)
2,245
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
76.7
Velocity (max)
75.1 - 76.7
Velo Range
75.0
Eff Velocity (avg)
1,743
Spin Rate (max)
1,699
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
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
Pitching Velos
2025
2022
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)
85.5
Changeup
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
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.0
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
79.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
77.0
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.0
Game Performance
2024
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.94
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
2025
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.9
Vizual Edge
Pitch Ai
Notes
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Comments
Draft Reports
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