@JMrozinski2029 79.4
Velocity (max)
3/08/26
CLASS OF 2029
RHP
1B
Jacob
Mrozinski
Muskego (HS) • WI
6' 1" • 218.5LBS
R/R • 15yr 4mo
Travel Team: 2029 Hitters Navy
6' 1" • 218.5LBSR/R • 15yr 4mo
Travel Team: 2029 Hitters Navy
Rankings
2029 National
Rankings available to Premium Subscriber
2029 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
77.5 - 79.4
Velo Range
3/08/26
2004
Spin Rate (avg)
3/08/26
Changeup
71 - 74
Velo Range
3/08/26
1789
Spin Rate (avg)
6/23/26
Curveball
66 - 68
Velo Range
3/08/26
1953
Spin Rate (avg)
3/08/26
Slider
67.1 - 69.4
Velo Range
6/23/26
2159
Spin Rate (avg)
6/23/26
Positional Tools
Hitting
Hitting
Pitching
2026
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Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
79.4
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
78.5
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).
2004
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.
25.5
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).
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
66.9
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).
1953
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).
1732
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).
68.2
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).
2159
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).
Sinker
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
79.1
Sinker
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).
2108
Sinker
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Milwaukee Summer ID
Jun 23, 2026
Trackman - Slider
69.8
Velocity (max)
67.1 - 69.4
Velo Range
66.1
Eff Velocity (avg)
2,262
Spin Rate (max)
2,159
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
73.0
Velocity (max)
69.0 - 73.0
Velo Range
68.9
Eff Velocity (avg)
1,854
Spin Rate (max)
1,789
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Sinker
80.3
Velocity (max)
78.2 - 79.7
Velo Range
77.2
Eff Velocity (avg)
2,191
Spin Rate (max)
2,134
Spin Rate (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
South Milwaukee Preseason ID
Mar 8, 2026
Trackman - Fastball
79.4
Velocity (max)
77.5 - 79.4
Velo Range
77.7
Eff Velocity (avg)
2,101
Spin Rate (max)
2,004
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
67.8
Velocity (max)
66.0 - 67.8
Velo Range
66.6
Eff Velocity (avg)
2,039
Spin Rate (max)
1,953
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
74.4
Velocity (max)
71.3 - 73.7
Velo Range
70.0
Eff Velocity (avg)
1,766
Spin Rate (max)
1,661
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - Sinker
79.8
Velocity (max)
78.8 - 79.8
Velo Range
78.4
Eff Velocity (avg)
2,131
Spin Rate (max)
2,072
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
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)
75.8
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
67.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
71.8
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
68.0
Game Performance
2026
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
Vizual Edge
Pitch Ai
Notes
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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.
Positional Profile: RHP/1B
Body: 6-0, 196-pounds. Strong, physical build with projectable proportions and a sturdy frame.
Delivery: Simple delivery with a medium leg-lift, tall/fall, works in-line down the mound.
Arm Action: RH. Longer arm swing, 3/4 slot.
FB: T79, 78-79 mph. 4S: Some finish through the zone, plays at the top. SINK: Runs to the arm-side, some sink to it. T2101, 2004 average rpm.
CB: 66-68 mph. Sharp action with sweep, wipeout potential. T2039, 1953 average rpm.
CH: 71-74 mph. Serviceable offering, developing feel, gradual fade. T1766, 1661 average rpm.
ATH: 15.30 max vertical.