Tucson Summer ID: Pitching Data Dive
August 26, 2025
This past Saturday, the Prep Baseball Arizona staff hosted it's final Summer ID event with the Tucson Summer ID. This event featured roughly 30 prospects in the 2026–2029 classes and provided a valuable opportunity for young athletes to get quality reps in a structured setting and compete in front of our staff. After some of the standout performances on Saturday, it is clear that the uncommitted talent pool in Arizona is deep.
Players also received video footage (will be edited and added to profiles in 2-3 weeks) and verified stats to their profiles, giving them a strong foundation for building their recruiting presence. Summer ID’s play a key role in identifying prospects for premier events such as the West Coast Super Sophomore Games, West Coast Games, and Preseason All-State Games
Yesterday, we highlighted the top overall performers in our Stats Analysis article. Today, we shift the focus to the mound as we continue our post-event coverage with a deeper look into the Pitching Data Dive.
To register for the Unsigned Senior Showcase, click here.
To register for the Mesa Fall ID, click here.
To register for the Tempe Fall ID, click here.
To request an invite to the West Coast Super Sophomore Games, click here.
To request an invite to the 2025 West Coast Games, click here.
FASTBALL
MAX VELOCITY
Max Fastball Velocity: This metric calculates the speed of the pitch as it’s released from the pitcher’s hand.
HIGHEST AVG. SPIN RATE
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.
HIGHEST AVG. IVB
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, and it’s also important to consider the pitch’s velocity as well as its release height when evaluating IVB measurements against each other.
HIGHEST AVG. HORIZONTAL MOVEMENT
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.”
HIGHEST STRIKE ZONE RATE%
For some context, in 2023 MLB pitchers averaged an In Zone% of around 49 percent in live game settings measured across all pitch types, according to Statcast.
CURVEBALL
HIGHEST AVG. SPIN RATE
HIGHEST AVG. IVB
HIGHEST AVG. HORIZONTAL MOVEMENT
HIGHEST STRIKE ZONE RATE%
SLIDER
HIGHEST AVG. SPIN RATE
HIGHEST AVG. IVB
HIGHEST AVG. HORIZONTAL MOVEMENT
HIGHEST STRIKE ZONE RATE%
CHANGEUP
AVG CHANGEUP SPIN RATE (RPM)
HIGHEST AVG. IVB
HIGHEST AVG. HORIZONTAL MOVEMENT
HIGHEST STRIKE ZONE RATE%
Upcoming Events
| Showcase | State | Date | Location |
| Mica Mountain Scout Day | AZ | 09/18 | Mica Mountain High School - Tucson, AZ |
| Unsigned Senior Showcase | AZ | 09/23 | Arizona Athletic Grounds, Mesa, AZ |
| 2025 West Coast Super Sophomore Games (Invite-Only) | AZ | 09/26 | University of Oregon / Bushnell University |
| 2025 West Coast Games | AZ | 10/03 | Loyola Marymount University - Page Stadium |
| Riot Baseball Scout Day | AZ | 10/06 | Youngker High School - Buckeye, AZ |
| Mesa Fall ID | AZ | 10/26 | Chandler-Gilbert Community College |
| Tucson Champs Scout Day | AZ | 10/28 | Tucson, AZ |
| Williams Field Scout Day | AZ | 11/02 | Williams Field High School - Gilbert, AZ |
| Swarm Scout Day | AZ | 11/09 | Mesa, AZ |
| Yavapai JUCO Scout Day | AZ | 11/15 | Yavapai College - Prescott, AZ |
| Trosky Arizona Scout Day | AZ | 11/16 | Arizona Athletic Grounds - Mesa, AZ |
| Apollo High School Scout Day | AZ | 11/22 | Apollo High School - Glendale, AZ |
| Tempe Fall ID | AZ | 11/23 | Hit Dogs Facility & Mountain Pointe HS |
| Tigers Scout Day | AZ | 11/25 | Millennium High School - Goodyear, AZ |