Prep Baseball Report

West Milwaukee Preseason ID: Pitcher Data Dive


Josh Fields
Wisconsin Staff

On Feb. 18, the PBR Wisconsin staff hosted the West Milwaukee Preseason ID at GRB STiKS Academy in Waukesha, Wis. This event featured 108 prospects, most of whom are Wisconsin natives, and allowed our staff an opportunity to get an in-depth look at the players in attendance.

Wednesday, we published our Quick Hits from the players from the event. Thursday, we broke down the top measurable data performers from the event with our Statistical Analysis. Today, we will take a further in-depth look at the top pitchers with the help of our tech partnerships, broken down by the categories down below:

 

TRACKMAN

FASTBALL

VELOCITY (MAX)

Rank Name State School Class Pos Velocity (max)
1 Greyson Zach WI Pewaukee 2025 SS 89.8 mph
2 Peter Kussow WI Arrowhead 2025 RHP 89.5 mph
3 Eli Bryant WI Beaver Dam 2025 SS 87.7 mph
4 Mason Sherman WI Waukesha West 2024 RHP 87.4 mph
5 Parker Meifert WI Greenfield 2024 RHP 86.7 mph
6 Carsen Dulak WI Germantown 2024 OF 85.3 mph
7 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 84.6 mph
8 Zachary Kiffmeyer WI Oshkosh North 2025 RHP 83.7 mph
9 Charlie Slawinski WI Brookfield East 2025 SS 83.6 mph
10 Tyson Grulkowski WI Muskego 2026 RHP 83.2 mph

Max Fastball Velocity: This metric calculates the speed of the pitch as it’s released from the pitcher’s hand.

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Bradyn Nelson WI Oconomowoc 2024 3B 2357 rpm
2 Jack Welak WI Catholic Memorial 2025 RHP 2252 rpm
3 Parker Meifert WI Greenfield 2024 RHP 2195 rpm
4 Tyson Grulkowski WI Muskego 2026 RHP 2180 rpm
5 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 2161 rpm

Spin Rate: This metric calculates the rate of spin on the baseball as it leaves the pitcher’s hand, measured in revolutions per minute (rpm). Historical data shows that high-spin fastballs lessen the impact of gravity, allowing for more ‘rise’ (or less fall, in other words) as it carries through the zone. Low-spin fastballs typically indicate the pitch has greater horizontal action, often making it tougher to square up, but generally easier to make contact with, leading to more ground balls, while high-spin fastballs show a correlation with swings and misses.

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Graiden Liethen WI Arrowhead 2025 RHP 17.6 in
2 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 16.8 in
3 Alex Ignacio WI Brookfield Central 2025 2B 16.3 in
4 Brady Carpenter WI Arrowhead 2024 OF 15.2 in
5 Preston Manthei WI Lake Country Lutheran 2025 3B 15.2 in

Induced Vertical Break: Used in short form as "IVB," this metric is most important on fastballs for creating rise and on curveballs for creating depth – it can also have some use when measuring sliders and cutters as well. Sliders tend to be closer to zero inches while cutters are generally between 5 and 15 inches. Usually fastballs and curveballs with large IVB have higher spin efficiencies as well. Sliders generally have very little (closer to zero) IVB and very low spin efficiencies. You could also categorize IVB into spin rate as this is part of the “useful movement” you’re looking for. IVB is also a huge part of vertical approach angle.

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Caiden Mentkowski IL Antioch 2025 SS 16.1
2 Charlie Slawinski WI Brookfield East 2025 SS 14.6
3 Tyson Baker WI Germantown High 2025 LHP -13.6
4 Dean Staudacher WI Muskego 2025 SS 13.5
5 Colton Semmelmann WI Brookfield Central 2026 LHP -13.5

Horizontal Break: Outlined on TrackMan’s own website: “... horizontal movement is measured in inches between where the pitch actually crosses the front of home plate side-wise, and where it would have crossed home plate side-wise if had it traveled in a perfectly straight line from release. A positive number means the break was to the right from the pitcher’s perspective, while a negative number means the break was to the left from the pitcher’s perspective.”

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Jack Welak WI Catholic Memorial 2025 RHP 66 %
2 Miken Haddon WI Catholic Memorial 2026 1B 57 %
3 Jack Stuck WI Nicolet 2025 2B 50 %
^ Nathan Huntley WI Brookfield Central 2025 2B 50 %

 

 


 

 

CURVEBALL

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 2548 rpm
2 Parker Meifert WI Greenfield 2024 RHP 2458 rpm
3 Tyson Grulkowski WI Muskego 2026 RHP 2329 rpm
4 Colton Semmelmann WI Brookfield Central 2026 LHP 2322 rpm
5 Owen Dobberstein WI Pewaukee 2025 RHP 2288 rpm
6 Noah Melby WI Brookfield East 2026 RHP 2252 rpm

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Sean Beug-Hoffman WI Brookfield Central 2025 RHP -10.5 in
2 Carsen Dulak WI Germantown 2024 OF -9.9 in
3 Brayden Ramus WI Arrowhead 2024 RHP -9.4 in
4 Vincent Bitter WI Brookfield Central 2026 RHP -8.2 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Sean Beug-Hoffman WI Brookfield Central 2025 RHP -10.5 in
2 Carsen Dulak WI Germantown 2024 OF -9.9 in
3 Brayden Ramus WI Arrowhead 2024 RHP -9.4 in
4 Vincent Bitter WI Brookfield Central 2026 RHP -8.2 in
5 Dean Staudacher WI Muskego 2025 SS 8.1 in
6 Ethan Daily WI Waukesha North 2026 3B 6.8 in
7 Cooper Haas WI Waukesha North 2025 OF -6.8 in
8 Colton Semmelmann WI Brookfield Central 2026 LHP -6.4 in
9 Tyson Grulkowski WI Muskego 2026 RHP -6.4 in
10 Parker Meifert WI Greenfield 2024 RHP -6.0 in

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Owen Dobberstein WI Pewaukee 2025 RHP 80 %
^ Noah Melby WI Brookfield East 2026 RHP 80 %
2 Parker Meifert WI Greenfield 2024 RHP 60 %
^ Ethan Daily WI Waukesha North 2026 3B 60 %
^ Greyson Zach WI Pewaukee 2025 SS 60 %
^ Miken Haddon WI Catholic Memorial 2026 1B 60 %
^ Caiden Mentkowski IL Antioch 2025 SS 60 %

 

 


 

 

SLIDER

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Peter Kussow WI Arrowhead 2025 RHP 2685
2 Tyson Grulkowski WI Muskego 2026 RHP 2620
3 Owen Dobberstein WI Pewaukee 2025 RHP 2433
4 Bradyn Nelson WI Oconomowoc 2024 3B 2238
5 Colton Semmelmann WI Brookfield Central 2026 LHP 2187

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Charlie Slawinski WI Brookfield East 2025 SS -8.6 in
2 Cail Geiger WI Menomonee Falls 2026 RHP 7.4 in
3 Nicholas (Niko) Frangopoulos WI Hartland Arrowhead 2026 OF -7.2 in
4 Ryan Brennecke WI Oconomowoc 2025 LHP 6.4 in
5 Jack Welak WI Catholic Memorial 2025 RHP -6.3 in
6 CJ Zehner WI Arrowhead 2025 RHP 6.2 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Colton Semmelmann WI Brookfield Central 2026 LHP 15.3
2 Peter Kussow WI Arrowhead 2025 RHP -14.5
3 Tyson Grulkowski WI Muskego 2026 RHP -14.5
4 Bradyn Nelson WI Oconomowoc 2024 3B -13.3
5 Vincent Bitter WI Brookfield Central 2026 RHP -12.6

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Liam St Denis WI Wauwatosa East 2025 RHP 80 %
2 Peter Kussow WI Arrowhead 2025 RHP 75 %
3 Ben Weber WI Oconomowoc 2026 1B 60 %
^ Charlie Slawinski WI Brookfield East 2025 SS 60 %
4 Owen Dobberstein WI Pewaukee 2025 RHP 50 %

 

 


 

 

CHANGEUP

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Cail Geiger WI Menomonee Falls 2026 RHP 22.9
2 Ethan Arnold WI Fond du lac 2025 RHP 18.8
3 Jack Welak WI Catholic Memorial 2025 RHP 16.7
4 Parker Meifert WI Greenfield 2024 RHP 16.3
5 Ryan Brennecke WI Oconomowoc 2025 LHP -15.6
6 Vincent Bitter WI Brookfield Central 2026 RHP 15.3
7 Devan Gentry-Komasa WI West Bend East 2024 RHP 15.2

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Owen Dobberstein WI Pewaukee 2025 RHP 100 %
^ Alex Ignacio WI Brookfield Central 2025 2B 100 %
^ Eli Bryant WI Beaver Dam 2025 SS 100 %
2 Jack Stuck WI Nicolet 2025 2B 80 %
^ Vincent Bitter WI Brookfield Central 2026 RHP 80 %
^ Zachary Kiffmeyer WI Oshkosh North 2025 RHP 80 %
3 Mason Sommer WI West Bend 2025 LHP 75 %
4 Carsen Dulak WI Germantown 2024 OF 66 %
^ CJ Zehner WI Arrowhead 2025 RHP 66 %
5 Noah Melby WI Brookfield East 2026 RHP 60 %
^ TJ Allemand WI Wayland Academy 2026 LHP 60 %
^ Mason Sherman WI Waukesha West 2024 RHP 60 %
^ Charlie Slawinski WI Brookfield East 2025 SS 60 %
^ Zach Flater WI Waterford 2025 SS 60 %
^ Parker Meifert WI Greenfield 2024 RHP 60 %
^ Tyson Baker WI Germantown High 2025 LHP 60 %
^ Sean Beug-Hoffman WI Brookfield Central 2025 RHP 60 %


+ CLICK HERE for a look at the complete statistics from the event.

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