GUD Baseball runs tech-supported pitching development programs in-house at Prime Athletics, 155 Wicks St in Grayslake, IL. Every athlete is measured, so the plan is built on data instead of guesswork. In 2026, our high school pitchers averaged 6.2 mph of velocity progress.
Prime Athletics in Grayslake. A short drive from Libertyville, Gurnee, Mundelein, Waukegan and the Chicago north suburbs.
Founder DJ Snelten pitched 13 years of pro ball across 8 MLB organizations and went from 89-92 to 97-102+ (PR 102.5 mph). Strength and conditioning is run by John Snelten, Head of Sports Performance and owner of Prime Athletics.
13 years of pro ball across 8 MLB organizations, with his big-league debut for the Giants in 2018. A mechanical change took him from sitting 89–92 to 97–102+, with a lifetime PR of 102.5 mph. Every GUD program is built on the process that got him there.
MLB organizations: Giants, Orioles, Rays, Cubs, Angels, Yankees, White Sox, Padres.
One of the top strength coaches in Northern Illinois. Over the last 12 years John has developed 250+ arms that throw 90 mph or harder. He owns Prime Athletics in Grayslake and runs strength & conditioning for every GUD athlete.
Drafted twice: by the Rays in 2019 and by the Angels in the 10th round in 2021. Pitched at South Carolina, then in the Angels system.
MLB organizations: Angels.
7 MLB seasons and 243 big-league appearances with the Nationals, Tigers, Braves and Angels. Also pitched in the A's, Mets, Reds, Twins and Padres organizations, and in Japan for the Yomiuri Giants.
MLB organizations: Nationals, Tigers, Braves, Angels, Athletics, Mets, Reds, Twins, Padres.
High school pitchers averaged +6.2 mph of velocity progress in 2026. 500+ athletes trained since 2019, 200+ throwing 90+ MPH, 150+ Division I scholarships.
In-house training at Prime Athletics plus a daily plan in the GUD Baseball app. We measure movement, strength, force and the delivery itself, find the one thing capping your velo, and build around it. Metric-driven insight takes the guesswork out of development.
Everything happens from the ground up. We test before we coach and retest to prove progress. No cookie-cutter delivery. In 2026, our high school pitchers averaged 6.2 mph of velocity progress.
High school and college pitchers who want to throw harder, get recruited or get drafted.
Yes. Strength and conditioning at Prime Athletics is part of the program.
Yes. Our remote velocity program works from anywhere.
Get a free mechanical breakdown at gudbaseball.com/breakdown, or apply at gudbaseball.com/apply.
Related: remote velocity program · coaching staff · early drift · front leg block