Prep Baseball Report

West FL IDs: Data Dive, Pitchers


PBR Florida
PBR Florida Staff

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The West FL IDs took place Tuesday, June 6th at Jack Russell Stadium in Clearwater, FL. The West FL IDs consisted of Future Games Tryouts, All-American IDs, and Uncommitted '24 IDs. The event featured players from the 2024-2028 classes participating in a pro-style workout and bullpens in front of the PBR Florida Scouting Staff.

Inside today’s Pitching Data Dive we will highlight the players with top metrics per Trackman. 

Yesterday, we broke down the stat leaders from the more traditional categories in our statistical analysis. Today, we will take an even closer look at the pitchers in attendance with the help of our tech partners, broken down by the categories and leaderboards below.

FASTBALL 

MAX VELOCITY (MPH)

Rank Name State School Class Pos Velocity (max)
1 Reed Biemiller FL Jesuit 2025 RHP 88.8 mph
2 Brock Golden FL OSCEOLA FUNDAMENTAL HIGH 2025 RHP 83.7 mph
3 Jackson Krukonis FL East Lake 2024 RHP 83.0 mph
4 Eli Millian FL East Lake 2026 RHP 82.5 mph
5 Hector Rivera FL Jesuit 2026 RHP 82.4 mph

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Brayden Spink FL East Lake 2026 OF 2225 rpm
2 Cooper Antalek FL Academy at the Lakes 2026 SS 2199 rpm
3 Jonathan Marzullo FL IMG Academy 2028 C 2094 rpm
4 Andrew Thalleen FL Academy at the Lakes 2026 RHP 2084 rpm
5 Jack Johnson FL Dunedin 2024 RHP 2064 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.

SPIN EFFICIENCY% (AVG.)

Rank Name State School Class Pos Spin Efficiency % (avg)
1 Brock Golden FL OSCEOLA FUNDAMENTAL HIGH 2025 RHP 98 %
2 Eli Millian FL East Lake 2026 RHP 97 %
3 Chase Andress FL Wharton 2026 OF 96 %
4 Jake Hartter FL Venice 2026 SS 94 %
5 Jackson Krukonis FL East Lake 2024 RHP 92 %

Spin Efficiency: This metric is the percentage of the raw spin rate that directly impacts pitch movement; so while raw spin is measured by revolutions per minute (rpm), spin efficiency is the ratio of true spin divided by raw spin. It’s important to understand that more is not always better when it comes to spin efficiency. The optimal spin efficiency on a pitch depends on the pitch type and should be understood in the context of a pitcher’s entire arsenal. Regarding the true four-seam fastball, a spin efficiency close to 100 percent is preferable, indicating that nearly all the backspin generated on the ball as it leaves the pitcher’s hand is contributing to the “riding” action the pitch has as it enters and exits the strike zone, making it especially effective in the upper third of the strike zone.

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Sebastian Prieto FL Jesuit 2026 1B 21.5 in
2 Chase Andress FL Wharton 2026 OF 20.3 in
3 Eli Millian FL East Lake 2026 RHP 17.4 in
4 Jonathan Marzullo FL IMG Academy 2028 C 17.4 in
5 Jake Hartter FL Venice 2026 SS 17.0 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 efficiency. 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 the vertical approach angle.

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Brock Golden FL OSCEOLA FUNDAMENTAL HIGH 2025 RHP 18.6
2 Hector Rivera FL Jesuit 2026 RHP 17.0
3 Andrew Thalleen FL Academy at the Lakes 2026 RHP 16.5
4 Cooper Antalek FL Academy at the Lakes 2026 SS 16.4
5 Eli Millian FL East Lake 2026 RHP 16.4

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.”


CURVEBALL

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Eli Millian FL East Lake 2026 RHP 2386 rpm
2 Cooper Antalek FL Academy at the Lakes 2026 SS 2291 rpm
3 Jackson Krukonis FL East Lake 2024 RHP 2265 rpm
4 Carson VanSweden FL Northside Christan 2024 LHP 2219 rpm
5 Jake Hartter FL Venice 2026 SS 2193 rpm

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Carson VanSweden FL Northside Christan 2024 LHP -8.2 in
2 Jake Hartter FL Venice 2026 SS 3.5 in
3 Cooper Antalek FL Academy at the Lakes 2026 SS 3.4 in
4 Jackson Krukonis FL East Lake 2024 RHP -2.3 in
5 Bryce Besece FL Jesuit 2027 C -2.3 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Carson VanSweden FL Northside Christan 2024 LHP 8.6
2 Eli Millian FL East Lake 2026 RHP -8.3
3 Chase Andress FL Wharton 2026 OF 7.2


SLIDER

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Jack Johnson FL Dunedin 2024 RHP 2490
2 Andrew Thalleen FL Academy at the Lakes 2026 RHP 2435
3 Reed Biemiller FL Jesuit 2025 RHP 2320
4 Hector Rivera FL Jesuit 2026 RHP 2215
5 Jackson Krukonis FL East Lake 2024 RHP 2082

INDUCED VERTICAL BREAK (AVG.)

Rank Name State School Class Pos IVB (avg)
1 Jonathan Marzullo FL IMG Academy 2028 C 11.4 in
2 Jackson Krukonis FL East Lake 2024 RHP 7.8 in
3 Jett Walters FL Berkeley Prep 2027 OF 6.4 in
4 Hector Rivera FL Jesuit 2026 RHP 5.5 in
5 Reed Biemiller FL Jesuit 2025 RHP -4.1 in

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Carson VanSweden FL Northside Christan 2024 LHP 11.8
2 Reed Biemiller FL Jesuit 2025 RHP -11.0
3 Jack Johnson FL Dunedin 2024 RHP -8.7
4 Jonathan Marzullo FL IMG Academy 2028 C 5.3
5 Bryce Besece FL Jesuit 2027 C -5.0


CHANGEUP

SPIN RATE (AVG.)

Rank Name State School Class Pos Spin Rate (avg)
1 Brayden Spink FL East Lake 2026 OF 1868 rpm
2 Hector Rivera FL Jesuit 2026 RHP 1731 rpm
3 Bryce Besece FL Jesuit 2027 C 1725 rpm
4 Reed Biemiller FL Jesuit 2025 RHP 1614 rpm
5 Jett Walters FL Berkeley Prep 2027 OF 1520 rpm

HORIZONTAL MOVEMENT (AVG.)

Rank Name State School Class Pos HM (avg)
1 Reed Biemiller FL Jesuit 2025 RHP 18.2
2 Hector Rivera FL Jesuit 2026 RHP 17.6
3 Brock Golden FL OSCEOLA FUNDAMENTAL HIGH 2025 RHP 17.1

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


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