Prep Baseball Report

West Milwaukee Preseason ID: Pitcher Data Dive


By. Josh Fields
Area Scout, Data Coordinator

On Feb. 10th, the Prep Baseball Wisconsin staff hosted the West Milwaukee Preseason ID at STiKS Academy in Waukesha, WI. Over 100 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 Peter Kussow WI Arrowhead 2025 RHP 92.7 mph
2 Ben Kuglitsch WI Muskego 2026 SS 91.3 mph
3 Rocco Conrad WI New Berlin West 2025 RHP 90.6 mph
4 Ryan Brennecke WI Oconomowoc 2025 LHP 90.6 mph
5 Eli Bryant WI Beaver Dam 2025 SS 89.8 mph
6 Cail Geiger WI Menomonee Falls 2026 RHP 89.6 mph
7 Colton Semmelmann WI Brookfield Central 2026 LHP 88.6 mph
8 Charlie Slawinski WI Brookfield East High 2025 SS 86.8 mph
9 Tyson Grulkowski WI Muskego 2026 RHP 86.4 mph
10 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 86.2 mph
11 Liam St Denis WI Wauwatosa East 2025 RHP 86.1 mph
12 Andrew Ishag WI Kettle Moraine 2025 LHP 86.0 mph
13 Owen Klosinski IL Lakes Community High School 2025 LHP 85.9 mph
14 Mason Sommer WI West Bend 2025 LHP 85.7 mph
15 Owen Dobberstein WI Pewaukee 2025 RHP 84.6 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 Jack Boerst WI Arrowhead High 2027 SS 2324 rpm
2 Ben Kuglitsch WI Muskego 2026 SS 2288 rpm
3 Tyson Grulkowski WI Muskego 2026 RHP 2241 rpm
4 Jaiden Delaney WI Oconomowoc 2025 RHP 2237 rpm
5 Brady Ploch WI Oconomowoc 2026 OF 2227 rpm
6 William Grellinger WI Marquette 2025 1B 2218 rpm
7 Charlie Slawinski WI Brookfield East High 2025 SS 2210 rpm
8 Owen Klosinski IL Lakes Community High School 2025 LHP 2177 rpm
9 Sam Wells WI Brookfield East 2026 3B 2171 rpm
10 Owen Dobberstein WI Pewaukee 2025 RHP 2169 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 Hunter Buchan WI Muskego High 2027 RHP 18.1 in
2 Ben Weber WI Oconomowoc High 2026 1B 16.8 in
3 Jack Frelich WI Notre Dame Academy 2025 OF 16.8 in
4 Brady Ploch WI Oconomowoc 2026 OF 16.7 in
5 Graiden Liethen WI Arrowhead 2025 RHP 16.6 in
6 Rocco Conrad WI New Berlin West 2025 RHP 16.5 in
7 Ben Kuglitsch WI Muskego 2026 SS 16.3 in
8 Mason Horn WI Muskego 2027 OF 16.0 in
9 Ethan Daily WI Waukesha North 2026 3B 16.0 in
10 Jack Stuck WI Nicolet 2025 2B 15.9 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 Ryan Rose WI West Bend West 2027 SS 18.5
2 Cail Geiger WI Menomonee Falls 2026 RHP 16.6
3 Sean Lemke WI Homestead 2027 1B 16.6
4 Samuel Jandrisevits WI New Berlin West 2027 OF 16.6
5 Nicholas (Niko) Frangopoulos WI Hartland Arrowhead 2026 OF 16.2
6 Mason Horn WI Muskego 2027 OF -15.9
7 Mason Sommer WI West Bend 2025 LHP -15.7
8 Brayden Zimmerman WI Slinger 2026 3B 14.8
9 Charlie Slawinski WI Brookfield East High 2025 SS 14.5
10 Tanner Buhlmann WI Arrowhead 2026 LHP -14.1

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 Noah Melby WI Brookfield East 2026 RHP 83 %
2 Ryan Brennecke WI Oconomowoc 2025 LHP 71 %
^ Ben Jones WI Mukwonago 2026 RHP 71 %
^ Peter Kussow WI Arrowhead 2025 RHP 71 %
^ Ben Kuglitsch WI Muskego 2026 SS 71 %
3 Cooper Haas WI Waukesha North 2025 LHP 66 %
^ Nicholas (Niko) Frangopoulos WI Hartland Arrowhead 2026 OF 66 %
4 Rocco Conrad WI New Berlin West 2025 RHP 62 %
5 Jaiden Delaney WI Oconomowoc 2025 RHP 57 %
^ TJ Allemand WI Wayland Academy 2026 LHP 57 %
^ Liam St Denis WI Wauwatosa East 2025 RHP 57 %
^ Charlie Hoven WI Whitefish Bay 2026 3B 57 %
^ Colton Semmelmann WI Brookfield Central 2026 LHP 57 %
^ Cooper Haas WI Brookfield East 2027 OF 57 %


CURVEBALL

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Peter Kussow WI Arrowhead 2025 RHP 2607 rpm
2 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 2587 rpm
3 Owen Dobberstein WI Pewaukee 2025 RHP 2469 rpm
4 Colton Semmelmann WI Brookfield Central 2026 LHP 2421 rpm
5 Jack Boerst WI Arrowhead High 2027 SS 2406 rpm
6 Sam Wells WI Brookfield East 2026 3B 2371 rpm
7 Ben Jones WI Mukwonago 2026 RHP 2349 rpm
8 Jaiden Delaney WI Oconomowoc 2025 RHP 2333 rpm
9 Tyler Vetch WI New Berlin West 2025 OF 2314 rpm
10 Andrew Ishag WI Kettle Moraine 2025 LHP 2264 rpm

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Sam Wells WI Brookfield East 2026 3B -17.0 in
2 Trey Kerkhoff WI Burlington 2026 3B -15.0 in
3 Sean Beug-Hoffman WI Brookfield Central 2025 RHP -11.6 in
4 Jackson Naber WI Slinger 2025 C -10.2 in
5 Brayden Zimmerman WI Slinger 2026 3B -9.0 in
6 Colton Semmelmann WI Brookfield Central 2026 LHP -8.6 in
7 Peter Kussow WI Arrowhead 2025 RHP -8.4 in
8 Jack Boerst WI Arrowhead High 2027 SS -8.3 in
9 Andrew Ishag WI Kettle Moraine 2025 LHP -8.0 in
10 Nolan Hanson WI Arrowhead 2027 RHP -8.0 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Linus Pajot WI Whitefish Bay High 2026 RHP -18.4
2 Peter Kussow WI Arrowhead 2025 RHP -16.7
3 Jack Boerst WI Arrowhead High 2027 SS -15.9
4 Owen Klosinski IL Lakes Community High School 2025 LHP 13.7
5 Andrew Ishag WI Kettle Moraine 2025 LHP 13.5
6 Colton Semmelmann WI Brookfield Central 2026 LHP 12.7
7 Emmet Kelchen WI Kettle Moraine High 2025 OF 12.0
8 Brayden Zimmerman WI Slinger 2026 3B -11.7
9 Sam Wells WI Brookfield East 2026 3B -10.7
10 William Grellinger WI Marquette 2025 1B -10.7

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Owen Dobberstein WI Pewaukee 2025 RHP 100 %
2 Jack Stuck WI Nicolet 2025 2B 80 %
^ Alex Hansen WI Arrowhead 2027 LHP 80 %
^ Brayden Zimmerman WI Slinger 2026 3B 80 %
3 Colton Semmelmann WI Brookfield Central 2026 LHP 75 %
^ Mason Sommer WI West Bend 2025 LHP 75 %


SLIDER

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Tyson Grulkowski WI Muskego 2026 RHP 2671
2 Sean Beug-Hoffman WI Brookfield Central 2025 RHP 2635
3 Nelson Raciti WI Brookfield 2027 2B 2505
4 Owen Dobberstein WI Pewaukee 2025 RHP 2495
5 Ben Kuglitsch WI Muskego 2026 SS 2379

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Hunter Buchan WI Muskego High 2027 RHP 8.1 in
2 Charlie Hoven WI Whitefish Bay 2026 3B -8.1 in
3 Charlie Slawinski WI Brookfield East High 2025 SS -7.8 in
4 Jack Frelich WI Notre Dame Academy 2025 OF -6.7 in
5 Linus Pajot WI Whitefish Bay High 2026 RHP -6.5 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Nelson Raciti WI Brookfield 2027 2B -17.7
2 Linus Pajot WI Whitefish Bay High 2026 RHP -16.8
3 Eli Bryant WI Beaver Dam 2025 SS -12.8
4 Sean Beug-Hoffman WI Brookfield Central 2025 RHP -11.9
5 Charlie Slawinski WI Brookfield East High 2025 SS -11.7
6 Tyson Grulkowski WI Muskego 2026 RHP -11.3
7 Alex Armiger WI Arrowhead 2026 RHP -11.1
8 Nicholas (Niko) Frangopoulos WI Hartland Arrowhead 2026 OF -11.0
9 Charlie Hoven WI Whitefish Bay 2026 3B -10.8
10 Graiden Liethen WI Arrowhead 2025 RHP -10.4

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Emmet Kelchen WI Kettle Moraine High 2025 OF 100 %
2 Nicholas (Niko) Frangopoulos WI Hartland Arrowhead 2026 OF 80 %
^ Ben Kuglitsch WI Muskego 2026 SS 80 %
^ Eli Bryant WI Beaver Dam 2025 SS 80 %
3 Jack Frelich WI Notre Dame Academy 2025 OF 66 %


CHANGEUP

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Ben Kuglitsch WI Muskego 2026 SS 19.6 in
2 Jack Frelich WI Notre Dame Academy 2025 OF 15.8 in
3 Jackson Naber WI Slinger 2025 C 15.1 in
4 Cooper Haas WI Waukesha North 2025 LHP 15.0 in
5 Decker Kleppin WI Random Lake 2027 3B 14.3 in

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Danny Flor WI Oconomowoc High 2027 3B 100 %
^ Jaiden Delaney WI Oconomowoc 2025 RHP 100 %
^ Brady Ploch WI Oconomowoc 2026 OF 100 %
^ Nolan Hanson WI Arrowhead 2027 RHP 100 %
2 Jack Stuck WI Nicolet 2025 2B 80 %
^ Cail Geiger WI Menomonee Falls 2026 RHP 80 %
^ Graiden Liethen WI Arrowhead 2025 RHP 80 %
^ Tanner Buhlmann WI Arrowhead 2026 LHP 80 %
3 TJ Allemand WI Wayland Academy 2026 LHP 75 %
^ Owen Dobberstein WI Pewaukee 2025 RHP 75 %
^ Mason Buchman WI Oak Creek 2025 RHP 75 %

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

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