82.8
Velocity (max)
6/24/26
CLASS OF 2028
RHP
3B
Zachary
Kroll
Colfax (HS) • WA
5' 8" • 170LBS
R/R • 16yr 1mo
5' 8" • 170LBS
R/R • 16yr 1mo
Rankings
2028 National
Rankings available to Premium Subscriber
2028 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
81.3 - 82.5
Velo Range
6/24/26
2272
Spin Rate (avg)
6/24/26
Curveball
70.9 - 72.7
Velo Range
6/24/26
2415
Spin Rate (avg)
6/24/26
96.8
Exit Velocity (max)
6/24/26
88.1
Exit Velocity (avg)
6/24/26
347
Distance (max)
6/24/26
54
Sweet Spot %
6/24/26
-
Hand Speed (max)
-
Bat Speed (max)
-
Rot. Acc (max)
54
Hard Hit %
6/24/26
6.99
60-yd
6/24/26
3.90
30-yd
6/24/26
1.61
10-yd
6/24/26
19.9
Run speed (max)
6/24/26
84
INF Velo
6/24/26
-
OF Velo
-
C Velo
-
Pop Time
Positional Tools
2026
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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).
84.0
Hitting
2026
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
96.8
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
88.1
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
347
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
233
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
22.7389
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.
Spokane Summer ID
Jun 24, 2026
Trackman - Hitting
96.8
Exit Velocity (max)
88.1
Exit Velocity (avg)
233
Distance (avg)
347
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
Pitching
2026
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.8
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
81.9
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).
2272
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.
27.7
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).
71.8
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).
2415
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).
Spokane Summer ID
Jun 24, 2026
Trackman - Fastball
82.8
Velocity (max)
81.3 - 82.5
Velo Range
80.5
Eff Velocity (avg)
2,402
Spin Rate (max)
2,272
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)
70.9 - 72.7
Velo Range
69.2
Eff Velocity (avg)
2,588
Spin Rate (max)
2,415
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
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
Game Performance
2026
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.61
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.9
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
6.99
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.
Spokane Summer ID
Jun 24, 2026
Vald
1.61
10-yd
3.90
30-yd
6.99
60-yd
19.9
Run speed (max)
2.43
RSI (max)
22.9
Jump Height (max)
Vizual Edge
Pitch Ai
Notes
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.