22.2
Hand Speed (max)
6/08/25
CLASS OF 2030
1B
RHP
Zach
Dionyssiou
Valleyview (HS) • NJ
5' 10" • 184LBS
R/R • 14yr 5mo
Travel Team: Morris County Cubs
5' 10" • 184LBSR/R • 14yr 5mo
Travel Team: Morris County Cubs
Commitment
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Best Of Stats
68.9
Bat Speed (max)
6/08/25
22.5
Rot. Acc (max)
6/08/25
46
Hard Hit %
6/06/26
97.4
Exit Velocity (max)
6/06/26
85.8
Exit Velocity (avg)
6/06/26
351
Distance (max)
6/06/26
64
Sweet Spot %
6/08/25
7.73
60-yd
6/06/26
4.26
30-yd
6/06/26
1.82
10-yd
6/06/26
17.7
Run speed (max)
6/06/26
83
INF Velo
6/06/26
-
OF Velo
-
C Velo
-
Pop Time
Fastball
81
Velocity (max)
6/06/26
78.5 - 80.5
Velo Range
6/06/26
2074
Spin Rate (avg)
6/06/26
Changeup
72 - 73.6
Velo Range
6/06/26
1216
Spin Rate (avg)
6/06/26
Curveball
64.9 - 65.6
Velo Range
6/06/26
1831
Spin Rate (avg)
6/08/25
Slider
66 - 70
Velo Range
6/06/26
2251
Spin Rate (avg)
6/06/26
Positional Tools
2026
2025
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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).
83.0
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
73.0
Hitting
2026
2025
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
97.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
85.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
351
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
148
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
18.2753
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).
88.7
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
76.3
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
285
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
161
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
17.3035
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.
2026 NJ Junior Future Games Trials (6.6.26)
Jun 6, 2026
Trackman - Hitting
97.4
Exit Velocity (max)
85.8
Exit Velocity (avg)
148
Distance (avg)
351
Distance (max)
Hard Hit %
Sweet Spot %
Fly Ball %
Ground Ball %
2025 NJ Rising Stars ID - Session I
Jun 8, 2025
Trackman - Hitting
88.7
Exit Velocity (max)
76.3
Exit Velocity (avg)
161
Distance (avg)
285
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2025
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
22.2
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.1
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
68.9
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
65.4
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 NJ Rising Stars ID - Session I
Jun 8, 2025
Blast - Hitting
22.2
Hand Speed (max)
20.1
Hand Speed (avg)
68.9
Bat Speed (max)
65.4
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2026
2025
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
81.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
79.5
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.
26.1
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).
65.3
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).
1804
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).
72.9
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).
1216
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).
67.9
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).
2251
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).
74.8
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
73.5
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).
1944
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).
60.4
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).
1831
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).
59.6
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).
2012
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 NJ Junior Future Games Trials (6.6.26)
Jun 6, 2026
Trackman - Fastball
81.0
Velocity (max)
78.5 - 80.5
Velo Range
77.9
Eff Velocity (avg)
2,184
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 - Curveball
65.6
Velocity (max)
64.9 - 65.6
Velo Range
62.0
Eff Velocity (avg)
1,966
Spin Rate (max)
1,804
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
70.7
Velocity (max)
66.0 - 70.0
Velo Range
64.7
Eff Velocity (avg)
2,432
Spin Rate (max)
2,251
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
73.6
Velocity (max)
72.0 - 73.6
Velo Range
70.5
Eff Velocity (avg)
1,388
Spin Rate (max)
1,216
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
2025 NJ Summer ID - Session I
Jun 8, 2025
Trackman - Fastball
74.8
Velocity (max)
71.9 - 74.8
Velo Range
71.7
Eff Velocity (avg)
2,314
Spin Rate (max)
1,944
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
61.7
Velocity (max)
58.4 - 61.7
Velo Range
57.1
Eff Velocity (avg)
1,894
Spin Rate (max)
1,831
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - Slider
60.9
Velocity (max)
58.4 - 60.7
Velo Range
56.8
Eff Velocity (avg)
2,097
Spin Rate (max)
2,012
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
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ 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.
2025 NJ Summer ID - Session I
Jun 8, 2025
Pitch Scores - Fastball
Hop+
Rise+
Sink+
Pitch Scores - Curveball
Hammer+
Sweep+
Pitch Scores - Slider
Hammer+
Sweep+
Pitching Velos
Game Performance
2026
2025
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.82
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.26
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.72
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.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
2.02
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.69
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
8.52
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.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
2026 NJ Junior Future Games Trials (6.6.26)
Jun 6, 2026
Vald
1.82
10-yd
4.26
30-yd
7.73
60-yd
17.7
Run speed (max)
1.87
RSI (max)
19.3
Jump Height (max)
2025 NJ Rising Stars ID - Session I
Jun 8, 2025
Vald
2.02
10-yd
4.69
30-yd
8.52
60-yd
16.0
Run speed (max)
0.81
RSI (max)
18.4
Jump Height (max)
Vizual Edge
2025
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.
47.39
Pitch Ai
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Physical
2026
2025
Grip Strgth (LH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (RH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (LH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (RH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.