close
close

Future game tests: JAX – Data Dive


Baseball Prep Florida
Prep Baseball Florida Staff

Future game tests: JAX – Data Dive

The Future Games Trials: JAX took place on Tuesday, July 2, at the University of North Florida in Jacksonville, FL. The event featured players from the classes of 2025-2028 participating in professional workouts followed by bullpens in front of Prep Baseball Florida’s scouting team.

In today’s data dive, we’ll highlight the players with the best metrics for Trackman, Blast, and Swift.

On Wednesday, we broke down the stat leaders from the more traditional categories of our statistical leaderboards. Today, with the help of our technology partners, we’ll take an even closer look at the players in attendance, broken down by the categories and leaderboards below.

Jugs

MAXIMUM SPEED (MPH)

SPIN RATE (AVERAGE)

Spin rate: This metric calculates the rate at which the baseball spins as it leaves the pitcher’s hand, measured in revolutions per minute (RPM). Historical data shows that high-spin fastballs reduce the effects of gravity, allowing for more “rise” (or in other words, less fall) as the ball flies through the zone. Low-spin fastballs typically indicate that the pitch has more horizontal movement, often making it harder to catch straight but generally easier to hit, resulting in more ground balls, while high-spin fastballs have a correlation with swings and mishits.

SPIN EFFICIENCY % (AVERAGE)

Spin efficiency: This value indicates the percentage of raw spin rate that directly affects the motion of the pitch. While raw spin is measured in 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 of a pitch depends on the type of pitch and should be understood in the context of the pitcher’s entire arsenal. With the true four-seam fastball, a spin efficiency of nearly 100% is preferable, indicating that almost all of the backspin the ball generates as it leaves the pitcher’s hand contributes to the “riding” motion of the pitch as it enters and exits the strike zone, making it particularly effective in the top third of the strike zone.

INDUCED VERTICAL FRACTURE (AVERAGE)

Induced vertical fracture: Used in the short form “IVB,” this stat is most important on fastballs to create lift and on curveballs to create depth – it can also be useful when measuring sliders and cutters. Sliders tend to be closer to zero inches, while cutters generally range from 5 to 15 inches. Typically, fastballs and curveballs with high IVB also have higher spin efficiency. Sliders generally have very little (closer to zero) IVB and very low spin efficiency. You can also classify IVB into spin rate, as that is part of the “useful movement” you are looking for. IVB is also a big part of vertical approach angle.

HORIZONTAL MOVEMENT (AVERAGE)

Horizontal fracture: According to TrackMan’s website, “…the horizontal movement is measured in inches between the point where the pitch actually crossed the front of home plate laterally and the point where it would have crossed home plate laterally had it traveled in a perfectly straight line from the launch. A positive number means that the break occurred to the right from the pitcher’s perspective, while a negative number means that the break occurred to the left from the pitcher’s perspective.”

SPIN RATE (AVERAGE)

INDUCED VERTICAL FRACTURE (AVERAGE)

HORIZONTAL MOVEMENT (AVERAGE)

SPIN RATE (AVERAGE)

1 Denton Lord FL SOUTH WALTON HIGH SCHOOL 2026 RHP

1830 rpm

2 Kyle Hopper FL THE FIRST ACADEMY 2025 RHP

1154 rpm

HORIZONTAL MOVEMENT (AVERAGE)

bat

55-METRE RUN


Exit speed (max.)

Exit velocity (average)

Exit velocity: This metric measures the speed of the ball (measured in miles per hour) as it leaves the club at the moment of contact.

DISTANCE OF THE HIT BALL (MAXIMUM)

SWEETSPOT%

Sweet Spot Percentage: This metric is determined by how many times the player produces a hit ball with a launch angle between 8 and 32 degrees during the session.


HAND SPEED (AVERAGE)

Hand speed: The observed speed measured at the handle of the racket (15 cm from the knob of the racket). The maximum hand speed is reached before the moment of impact, very close to the moment of the swing when the wrists release.

RACKET SPEED (AVERAGE)

Racket speed: The observed speed of the club’s sweet spot at impact. The club’s sweet spot is measured 15 cm from the tip of the club.

ROTARY ACCELERATION (AVERAGE)

Rotational acceleration: Rotation measures how quickly your club accelerates into the swing plane. Rotation is a good indicator of how you increase club speed through proper sequencing versus pulling the club with your hands. The faster your rotational acceleration, the more power you have and the more time you have to make a decision at the clubface.

+ CLICK HERE to view full event statistics.

UPCOMING EVENTS