87.3
Velocity (max)
3/12/23
CLASS OF 2024
RHP
OF
Alex
Kronfeld
Holmen (HS) • WI
5' 11" • 185LBS
R/R • 17yr 11mo
Travel Team: Holmen Legion Post 284
5' 11" • 185LBS
R/R • 17yr 11mo
Travel Team: Holmen Legion Post 284
Rankings
2024 National
Rankings available to Premium Subscriber
2024 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
86 - 87
Velo Range
3/12/23
1971
Spin Rate (avg)
6/19/23
Changeup
69.9 - 75.3
Velo Range
3/12/23
1499
Spin Rate (avg)
3/12/23
Curveball
66 - 69
Velo Range
3/12/23
2204
Spin Rate (avg)
3/12/23
Slider
68.4 - 71.3
Velo Range
3/12/23
2136
Spin Rate (avg)
3/12/23
7.01
60
3/12/23
3.97
30-yd
8/22/22
1.71
10-yd
8/22/22
18.1
Run speed (max)
8/22/22
Positional Tools
2023
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.01
Hitting
Hitting
Pitching
2023
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
87.3
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
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).
1966
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.
23.4
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).
67.2
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).
2204
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).
71.6
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).
1486
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).
68.1
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).
2053
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).
79.2
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).
1685
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.
21.7
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).
62.2
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).
1869
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).
66.2
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).
1335
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).
PBR MN Top Prospect Games (2024 Grads)
Jun 19, 2023
Trackman - Fastball
84.9
Velocity (max)
82.3 - 84.2
Velo Range
81.6
Eff Velocity (avg)
2,058
Spin Rate (max)
1,971
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
70.6
Velocity (max)
66.3 - 69.0
Velo Range
66.1
Eff Velocity (avg)
2,139
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 %
Trackman - ChangeUp
67.6
Velocity (max)
66.7
Eff Velocity (avg)
1,431
Spin Rate (max)
1,431
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Madison Preseason ID
Mar 12, 2023
Trackman - Fastball
87.3
Velocity (max)
86.0 - 86.9
Velo Range
85.1
Eff Velocity (avg)
2,010
Spin Rate (max)
1,948
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - Curveball
69.6
Velocity (max)
66.0 - 68.8
Velo Range
65.8
Eff Velocity (avg)
2,269
Spin Rate (max)
2,204
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - Slider
71.4
Velocity (max)
68.4 - 71.3
Velo Range
66.9
Eff Velocity (avg)
2,239
Spin Rate (max)
2,136
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
75.3
Velocity (max)
69.9 - 75.3
Velo Range
72.0
Eff Velocity (avg)
1,575
Spin Rate (max)
1,499
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Eastern Wisconsin Open
Aug 22, 2022
Trackman - Fastball
79.2
Velocity (max)
76.4 - 79.0
Velo Range
75.2
Eff Velocity (avg)
1,777
Spin Rate (max)
1,685
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Curveball
63.6
Velocity (max)
61.1 - 63.3
Velo Range
60.1
Eff Velocity (avg)
1,914
Spin Rate (max)
1,869
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
67.0
Velocity (max)
65.4 - 66.9
Velo Range
64.1
Eff Velocity (avg)
1,374
Spin Rate (max)
1,335
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Pitch Scores
2023
2022
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
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.
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
2023
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)
84.8
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
67.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
70.2
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
68.5
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)
77.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
62.0
Changeup
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
2022
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.71
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.97
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.40
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.
1.71
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.97
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.40
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.
Eastern Wisconsin Open
Aug 22, 2022
Swift
1.71
10-yd
3.97
30-yd
7.40
60-yd
18.1
Run speed (max)
8.1
Run Speed (avg)
1.58
RSi (max)
1.58
RSi (avg)
1,640
Jump Power (max)
27.5
Jump Height (max)
16.0
Jump Height (avg)
Visual Edge
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
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Positional Profile: RHP/OF Ranked 108th in WI 2024 class
Body: 5-11, 185-pounds.
Delivery: Works from stretch, squared start, quick leg lift, coiled balance position, average mover, lands clean
Arm Action: RH. Short arm action, closed shoulders, elbow gets behinf, inverted w, horizontal elbow, 3/4 slot
FB: T85, 82-84 mph. Straight T2058, 1971 average rpm.
SL: 66-69 mph. 10/4 sweep T2139, 2032 average rpm.
CH: 68-68 mph. Straight T1431, 1431 average rpm.
Positional Profile: RHP/OF
Body: 5-11, 185-pounds. Athletic build, shows some present strength.
Delivery: Stretch only, pre-sets in the back hip, drop/drive lower-half, works in-line.
Arm Action: RH. Long, quick arm, high 3/4 slot.
FB: T87, 86-87 mph. Late bore and tail through the zone. T2010, 1948 average rpm.
CB: 66-69 mph. 11/5 shape and break with ability to land for strikes. T2269, 2204 average rpm.
SL: 68-71 mph. More lateral breaker than the curveball with ability to land for strikes. T2239, 2136 average rpm.
CH: 70-75 mph. Thrown with fastball intent has late fade and depth through the zone and below the zone. T1575, 1499 average rpm.
RHP Alex Kronfeld (Holmen, 2024) gave a strong look throughout his ‘pen on Sunday. Built with a strong-bodied, 5-foot-11, 185-pound frame, Kronfield uses a high-intent delivery to produce a fastball up to 87 mph, sitting right at 86 mph throughout his pen. He showed two different breaking balls with a knack to spin both of them; the first being a curveball at 66-69 mph, playing with depth and 11/5 shape. His second breaking ball was a slider at 68-71 mph, playing with more 10/4 shape and flashing sharp action. His final offering was a changeup at 70-75 mph, killing spin and averaging over 15” of run.
Positional ProfileRHP/OF
Body: 5-9, 180-pounds. Athletic, sloped shoulders.
Delivery: Slightly offline, longer arc, low 3/4 slot.
Arm Action: .
FB: T79.2, 76-79 mph. Life through the zone, sinking action to the bottom of the zone. T1777, 1685 average rpm.
CB: 61-63 mph. Slurvy 11/5 shape. T1914, 1869 average rpm.
CH: 65-67 mph. Fades to the bottom of the zone. T1374, 1335 average rpm.