Author of the Downright Filthy Pitching Series, the books that introduced the world to The Science of Effective Velocity. This science was the foundation for all modern pitching deception metrics, including the Pitch Tunnel, Movement Mechanics such as using seams and tilt axis to create movements and Location Adjusted Speed or EvMPH, or the true reactionary speed of a pitch.

Effective Velocity also introduced the baseball and softball world to Exit Velocity & Launch Angle as swing diagnostic tools over 2 decades ago. Perry worked with many MLB coaches, pitchers and hitters to better understand 'Timing', the most important element in the pitcher/hitter confrontation. Tim Hyers, hitting coach for the 2023 World Series Champs, Texas Rangers calls Perry the "Father of Timing. We use Effective Velocity every day in our game planning."

In the softball world, Perry has worked with the coaches of 8 of the last 11 National Champions, including Oklahoma Softball and their 4 consecutive Championships in a row, which had never been accomplished before. OU Softball shattered virtually every record in the history of softball, but also shattered many myths. Myths like, 'you have to sacrifice power for average'. The led the nation in Batting Average as well as Home Runs, while also hitting more HRs than strikeouts one year.

JT Gasso, hitting coach of the OU softball program also uses Effective Velocity at the core of their game planning. JT Gasso says, "When you look at opposing pitchers through the Ev Lens, there's nowhere to hide."