South Milwaukee Preseason ID: Pitcher Data Dive
March 8, 2024
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 | 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 | 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 | St. Thomas More | 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 | 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 | 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 | 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 | 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 | 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 | St. Thomas More | 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 | 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 | 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 | 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 High | 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 | 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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