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Midwest Super Sophomore Games: Wisconsin Pitching Data Dive

August 21, 2026
By: Anthony Jablonski
Prep Baseball Wisconsin Staff

From July 31st through August 2nd, Prep Baseball staff hosted the Midwest Super Sophomore Games at Indiana University - Bart Kaufman Field in Bloomington, IN. 110 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 staff.

We've already posted a Statistical Analysis from the event, highlighting more of the traditional statistical categories. Also, we released our Takeaways story, highlighting some of the event's top performers.

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 Brady Seim WI Sun Prairie 2029 RHP 89.1 mph
2 Sutton Nelson WI Waupun 2029 SS 88.8 mph
3 Cooper Graham WI Mukwonago 2029 RHP 88.5 mph
4 Heath Rosemeyer WI Fall Creek 2029 RHP 84.0 mph
5 Trent Demeuse WI Preble 2029 LHP 83.9 mph
6 Robert Perez II WI Bay Port 2029 OF 83.8 mph
7 Beckett Hermus WI Kimberly 2029 SS 83.6 mph
8 Henri Alesci WI Sussex Hamilton 2029 LHP 82.7 mph
9 Erik Muresan WI Arrowhead 2029 RHP 80.9 mph
10 Ty Ziesemer WI Lake Country Lutheran 2029 LHP 80.6 mph

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Brady Seim WI Sun Prairie 2029 RHP 2417 rpm
2 Heath Rosemeyer WI Fall Creek 2029 RHP 2268 rpm
3 Trent Demeuse WI Preble 2029 LHP 2141 rpm
4 Sutton Nelson WI Waupun 2029 SS 2117 rpm
5 Cooper Graham WI Mukwonago 2029 RHP 1992 rpm
6 Gabriel Seifert WI Jefferson 2029 1B 1980 rpm
7 Ty Ziesemer WI Lake Country Lutheran 2029 LHP 1963 rpm
8 Robert Perez II WI Bay Port 2029 OF 1955 rpm
9 Henri Alesci WI Sussex Hamilton 2029 LHP 1929 rpm
10 Carter Hyland WI Waukesha West 2029 RHP 1845 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 Gabriel Seifert WI Jefferson 2029 1B 17.6 in
2 Trent Demeuse WI Preble 2029 LHP 16.8 in
3 Sutton Nelson WI Waupun 2029 SS 16.5 in
4 Ty Ziesemer WI Lake Country Lutheran 2029 LHP 15.8 in
5 Robert Perez II WI Bay Port 2029 OF 15.4 in
6 Heath Rosemeyer WI Fall Creek 2029 RHP 14.8 in
7 Brady Seim WI Sun Prairie 2029 RHP 13.8 in
8 Beckett Hermus WI Kimberly 2029 SS 13.8 in
9 Erik Muresan WI Arrowhead 2029 RHP 13.0 in
10 Cooper Graham WI Mukwonago 2029 RHP 11.4 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 Ty Ziesemer WI Lake Country Lutheran 2029 LHP -15.9
2 Brady Seim WI Sun Prairie 2029 RHP 14.1
3 Robert Perez II WI Bay Port 2029 OF -12.4
4 Trent Demeuse WI Preble 2029 LHP -11.4
5 Gabriel Seifert WI Jefferson 2029 1B -9.7
6 Sutton Nelson WI Waupun 2029 SS 9.0
7 Beckett Hermus WI Kimberly 2029 SS 8.3
8 Carter Hyland WI Waukesha West 2029 RHP 7.4
9 Erik Muresan WI Arrowhead 2029 RHP 7.3
10 Cooper Graham WI Mukwonago 2029 RHP 7.0

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 Ty Ziesemer WI Lake Country Lutheran 2029 LHP 55 %
2 Henri Alesci WI Sussex Hamilton 2029 LHP 50 %
^ Carter Hyland WI Waukesha West 2029 RHP 50 %
3 Robert Perez II WI Bay Port 2029 OF 44 %

Average MLB pitchers throw 62% strikes, and better pitchers throw strikes 65% of the time, or roughly 2:1 strikes to balls.

CURVEBALL

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Heath Rosemeyer WI Fall Creek 2029 RHP 2311 rpm
2 Gabriel Seifert WI Jefferson 2029 1B 2263 rpm
3 Erik Muresan WI Arrowhead 2029 RHP 2200 rpm
4 Cooper Graham WI Mukwonago 2029 RHP 2158 rpm

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Cooper Graham WI Mukwonago 2029 RHP -5.6 in
2 Heath Rosemeyer WI Fall Creek 2029 RHP -5.5 in
3 Trent Demeuse WI Preble 2029 LHP -4.5 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Gabriel Seifert WI Jefferson 2029 1B 11.1
2 Erik Muresan WI Arrowhead 2029 RHP -9.3
3 Heath Rosemeyer WI Fall Creek 2029 RHP -9.1

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Erik Muresan WI Arrowhead 2029 RHP 52 %
2 Cooper Graham WI Mukwonago 2029 RHP 47 %
3 Heath Rosemeyer WI Fall Creek 2029 RHP 35 %

SLIDER

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Henri Alesci WI Sussex Hamilton 2029 LHP 2488
2 Brady Seim WI Sun Prairie 2029 RHP 2327
3 Sutton Nelson WI Waupun 2029 SS 2214
4 Carter Hyland WI Waukesha West 2029 RHP 2019

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Ty Ziesemer WI Lake Country Lutheran 2029 LHP 6.9 in
2 Sutton Nelson WI Waupun 2029 SS 3.3 in
3 Robert Perez II WI Bay Port 2029 OF -1.9 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Ty Ziesemer WI Lake Country Lutheran 2029 LHP 16.6
2 Henri Alesci WI Sussex Hamilton 2029 LHP 16.4
3 Sutton Nelson WI Waupun 2029 SS -9.3

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Brady Seim WI Sun Prairie 2029 RHP 85 %
2 Sutton Nelson WI Waupun 2029 SS 62 %
3 Carter Hyland WI Waukesha West 2029 RHP 38 %

CHANGEUP

Spin Rate (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Heath Rosemeyer WI Fall Creek 2029 RHP 1948 rpm
2 Sutton Nelson WI Waupun 2029 SS 1812 rpm
3 Trent Demeuse WI Preble 2029 LHP 1713 rpm

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Heath Rosemeyer WI Fall Creek 2029 RHP 10.5 in
2 Beckett Hermus WI Kimberly 2029 SS 7.1 in
3 Henri Alesci WI Sussex Hamilton 2029 LHP 5.7 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Sutton Nelson WI Waupun 2029 SS 16.3
2 Carter Hyland WI Waukesha West 2029 RHP 14.8
3 Ty Ziesemer WI Lake Country Lutheran 2029 LHP -13.9
4 Heath Rosemeyer WI Fall Creek 2029 RHP 12.4
5 Henri Alesci WI Sussex Hamilton 2029 LHP -11.8
6 Robert Perez II WI Bay Port 2029 OF -11.7

STRIKE ZONE RATE%

Rank Name State School Class Pos Zone %
1 Heath Rosemeyer WI Fall Creek 2029 RHP 100 %
2 Sutton Nelson WI Waupun 2029 SS 75 %
3 Beckett Hermus WI Kimberly 2029 SS 60 %
4 Carter Hyland WI Waukesha West 2029 RHP 50 %

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

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