Prep Baseball Report

South Milwaukee Preseason ID: Pitcher Data Dive


By. Josh Fields
Area Scout, Data Coordinator

On Feb. 24th, the Prep Baseball Wisconsin staff hosted the South Milwaukee Preseason ID at Hitters Baseball in Caledonia, WI. Around 90 players participated in a pro-style workout, gathering unrivaled access to data through our state-of-the-art tech partners, as well as in-depth scouting analysis from our Prep Baseball Wisconsin staff.

Yesterday, we looked at the top measurable data performers from the event, found in our Statistical Analysis, where we broke down the stat leaders from the more traditional categories. Today, we will take a further in-depth look at the top positional prospects with the help from our tech partnerships, broken down by the categories down below:

TRACKMAN

FASTBALL

VELOCITY (MAX)

Rank Name State School Class Pos Velocity (max)
1 Ethan Bauerschmidt WI Tremper 2025 SS 91.7 mph
2 Jacob Haughton WI Case High 2025 RHP 90.3 mph
3 Tanner Effertz WI Whitnall 2026 RHP 88.8 mph
4 Sam Hirthe WI New Berlin Eisenhower 2025 RHP 88.5 mph
5 Cameron Carter WI Arrowhead 2026 RHP 86.5 mph
6 Ira Hilbelink WI Cedar Grove-Belgium 2027 OF 86.4 mph
7 Douglas Wagner WI Germantown 2025 RHP 86.2 mph
8 Darren Law IL Oak Park & River Forest High Sch 2026 RHP 85.9 mph
9 Zachary Kiffmeyer WI Oshkosh North 2025 RHP 85.3 mph
10 Joseph Suokko WI Westosha Central 2025 1B 85.2 mph
11 Owen Klosinski IL Lakes Community 2025 LHP 85.1 mph
12 Nolan Litkowiec WI Cudahy 2025 RHP 84.9 mph
13 Finley Pearson WI South Milwaukee 2027 RHP 84.7 mph
14 Cooper Schaefgen WI Oconomowoc 2027 3B 84.6 mph
15 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP 83.8 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 Sam Hirthe WI New Berlin Eisenhower 2025 RHP 2405 rpm
2 Tanner Effertz WI Whitnall 2026 RHP 2307 rpm
3 Ethan Bauerschmidt WI Tremper 2025 SS 2278 rpm
4 Owen Klosinski IL Lakes Community 2025 LHP 2232 rpm
5 Brady Dospel WI Germantown High 2026 LHP 2179 rpm
6 Cooper Schaefgen WI Oconomowoc 2027 3B 2177 rpm
7 Boden Brandner WI Hartford Union 2027 3B 2167 rpm
8 Zaidan Eblin WI Waterford Union 2025 RHP 2159 rpm
9 Joseph Suokko WI Westosha Central 2025 1B 2154 rpm
10 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP 2135 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 Anthony Sirocchi WI Westosha Central 2027 RHP 20.7 in
2 Marek Wawrzyniakowski WI Catholic Memorial 2025 C 20.6 in
3 Parker Davis WI Burlington 2027 1B 20.1 in
4 Cooper Schaefgen WI Oconomowoc 2027 3B 19.8 in
5 Kaden Hegemann WI waterford Union High School 2025 OF 18.4 in
6 Drake DeWildt WI Indian Trail 2025 SS 17.9 in
7 Mason Robertson WI Martin Luther 2027 LHP 17.7 in
8 Cameron Carter WI Arrowhead 2026 RHP 17.3 in
9 Bo Behrendt WI Whitefish Bay 2026 RHP 17.3 in
10 Douglas Wagner WI Germantown 2025 RHP 16.9 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 Darren Law IL Oak Park & River Forest High Sch 2026 RHP 19.9
2 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP 16.4
3 Brady Dospel WI Germantown High 2026 LHP -16.3
4 Jacob Haughton WI Case High 2025 RHP 16.2
5 Ethan Bauerschmidt WI Tremper 2025 SS 15.5

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 Matthew Pokorny WI Tremper 2025 RHP 83 %
^ Gabe Schmidt WI St. Thomas More 2025 RHP 83 %
2 Parker Davis WI Burlington 2027 1B 80 %
3 Jack Spielmann WI Milton 2027 C 71 %


CURVEBALL

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Grant Manthei WI Lake Country Lutheran 2026 C 2516 rpm
2 Zaidan Eblin WI Waterford Union 2025 RHP 2474 rpm
3 Darren Law IL Oak Park & River Forest High Sch 2026 RHP 2458 rpm
4 Boden Brandner WI Hartford Union 2027 3B 2408 rpm
5 Sam Hirthe WI New Berlin Eisenhower 2025 RHP 2401 rpm
6 Jacob Haughton WI Case High 2025 RHP 2357 rpm
7 Gabe Schmidt WI St. Thomas More 2025 RHP 2285 rpm
8 Joseph Suokko WI Westosha Central 2025 1B 2206 rpm
9 Matthew Pokorny WI Tremper 2025 RHP 2176 rpm
10 Kaden Hegemann WI waterford Union High School 2025 OF 2168 rpm

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Darren Law IL Oak Park & River Forest High Sch 2026 RHP -14.0 in
2 Colton Flucas WI Sussex Hamilton 2026 OF -13.1 in
3 Finley Pearson WI South Milwaukee 2027 RHP -13.0 in
4 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP -11.8 in
5 Zaidan Eblin WI Waterford Union 2025 RHP -11.4 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Owen Klosinski IL Lakes Community 2025 LHP 15.8
2 Jackson Farina WI Waukesha West 2027 OF -15.5
3 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP -14.1
4 Zaidan Eblin WI Waterford Union 2025 RHP -14.1
5 Joseph Suokko WI Westosha Central 2025 1B 13.7
6 Grant Manthei WI Lake Country Lutheran 2026 C -13.0
7 Ira Hilbelink WI Cedar Grove-Belgium 2027 OF -13.0
8 Hunter Wagner WI Muskego 2027 1B -12.3
9 Sam Hirthe WI New Berlin Eisenhower 2025 RHP -11.5
10 Mason Robertson WI Martin Luther 2027 LHP 10.3

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Ira Hilbelink WI Cedar Grove-Belgium 2027 OF 80 %
2 Sam Hirthe WI New Berlin Eisenhower 2025 RHP 75 %
^ Colton Flucas WI Sussex Hamilton 2026 OF 75 %
^ Briar Thoe WI Indian Trail 2026 LHP 75 %
3 Anthony Sirocchi WI Westosha Central 2027 RHP 60 %
^ Cooper Schaefgen WI Oconomowoc 2027 3B 60 %
^ Boden Brandner WI Hartford Union 2027 3B 60 %
^ Grant Manthei WI Lake Country Lutheran 2026 C 60 %


SLIDER

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Darren Law IL Oak Park & River Forest High Sch 2026 RHP 2562
2 Tanner Effertz WI Whitnall 2026 RHP 2513
3 Ethan Bauerschmidt WI Tremper 2025 SS 2450
4 Nolan Litkowiec WI Cudahy 2025 RHP 2340
5 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP 2312

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP -10.4 in
2 Darren Law IL Oak Park & River Forest High Sch 2026 RHP -9.8 in
3 Owen Klosinski IL Lakes Community 2025 LHP -8.8 in
4 Marek Wawrzyniakowski WI Catholic Memorial 2025 C 8.5 in
5 Ethan Bauerschmidt WI Tremper 2025 SS -6.3 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Darren Law IL Oak Park & River Forest High Sch 2026 RHP -19.0
2 Cal Schneider WI New Berlin Eisenhower 2027 LHP 18.3
3 Tanner Effertz WI Whitnall 2026 RHP -14.1
4 Damian Kosempa WI MARQUETTE UNIVERSITY HIGH SCHOOL 2026 RHP -14.0
5 Owen Klosinski IL Lakes Community 2025 LHP 9.8

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Marek Wawrzyniakowski WI Catholic Memorial 2025 C 60 %
^ Taylor Boudreau WI Oak Creek 2025 RHP 60 %


CHANGEUP

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Anthony Sirocchi WI Westosha Central 2027 RHP 19.0 in
2 Tenzin Pavlik WI Shorewood 2027 3B 16.2 in
3 Jack Spielmann WI Milton 2027 C 16.1 in
4 Drake DeWildt WI Indian Trail 2025 SS 15.6 in
5 Zachary Steichen WI Brookfield East 2027 OF 15.3 in
6 Cooper Schaefgen WI Oconomowoc 2027 3B 15.0 in
7 Briar Thoe WI Indian Trail 2026 LHP 14.5 in
8 Tanner Effertz WI Whitnall 2026 RHP 12.9 in
9 Jude Rogowski WI Union Grove High 2026 SS 12.6 in
10 Ethan Bauerschmidt WI Tremper 2025 SS 12.5 in

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Brayden Duran IL Zion-Benton Twnshp Hi Sch 2027 OF 100 %
2 Colton Flucas WI Sussex Hamilton 2026 OF 83 %
3 Taylor Boudreau WI Oak Creek 2025 RHP 80 %
4 Joseph Suokko WI Westosha Central 2025 1B 75 %
^ Jacob Haughton WI Case High 2025 RHP 75 %
5 Ira Hilbelink WI Cedar Grove-Belgium 2027 OF 60 %
^ Drake DeWildt WI Indian Trail 2025 SS 60 %

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

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