20.2
Hand Speed (max)
2/15/26
CLASS OF 2029
OF
RHP
Zack
Vossenkemper
Chaparral (HS) • CO
5' 10" • 139LBS
R/R • 15yr
Travel Team: USA Prime National Scout 2029
5' 10" • 139LBSR/R • 15yr
Travel Team: USA Prime National Scout 2029
Rankings
2029 National
Rankings available to Premium Subscriber
2029 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
65.8
Bat Speed (max)
2/15/26
9.9
Rot. Acc (max)
2/15/26
-
Hard Hit %
86.7
Exit Velocity (max)
2/15/26
72.1
Exit Velocity (avg)
2/15/26
233
Distance (max)
2/15/26
50
Sweet Spot %
2/15/26
7.15
60-yd
2/15/26
3.91
30-yd
2/15/26
1.69
10-yd
2/15/26
18.9
Run speed (max)
2/15/26
-
INF Velo
80
OF Velo
2/15/26
-
C Velo
-
Pop Time
Fastball
79.1
Velocity (max)
2/15/26
77 - 79
Velo Range
2/15/26
1879
Spin Rate (avg)
2/15/26
Curveball
64.8 - 66.3
Velo Range
2/15/26
2493
Spin Rate (avg)
2/15/26
Slider
66 - 66
Velo Range
2/15/26
2479
Spin Rate (avg)
2/15/26
Positional Tools
2026
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.15
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
80.0
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.
12.1
Hitting
2026
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
86.7
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
72.1
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
233
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
127
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
15.2309
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.
Denver Preseason ID
Feb 15, 2026
Trackman - Hitting
86.7
Exit Velocity (max)
72.1
Exit Velocity (avg)
127
Distance (avg)
233
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2026
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
20.2
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
19.4
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
65.8
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
63.3
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.
Denver Preseason ID
Feb 15, 2026
Blast - Hitting
20.2
Hand Speed (max)
19.4
Hand Speed (avg)
65.8
Bat Speed (max)
63.3
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2026
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).
77.7
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).
1879
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.
24.2
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).
65.8
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).
2493
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).
65.8
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).
2479
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).
Denver Preseason ID
Feb 15, 2026
Trackman - Fastball
79.1
Velocity (max)
76.6 - 78.8
Velo Range
75.6
Eff Velocity (avg)
1,983
Spin Rate (max)
1,879
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
66.3
Velocity (max)
64.8 - 66.3
Velo Range
63.9
Eff Velocity (avg)
2,641
Spin Rate (max)
2,493
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
65.8
Velocity (max)
63.7
Eff Velocity (avg)
2,479
Spin Rate (max)
2,479
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Pitch Scores
2026
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.
Pitching Velos
2026
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)
78.0
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
65.5
Slider
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
2026
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.69
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.91
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.15
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Vizual Edge
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
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Physical
2026
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.