Our Story
Why Functional Precision
We exist because elite performance shouldn't be reserved for the few. Competitive athletes deserve access to the same science, precision, and developmental expertise that professional organizations use.
Meet the Founder
Shaylon Rettig, MD
Dr. Rettig founded Functional Precision out of a simple but powerful observation: the athletes who thrive long-term aren't just the most talented — they're the ones who move best. After years of treating young athletes in clinical settings, he saw the same preventable injuries and performance plateaus repeating themselves.
His dual board certifications in Pediatrics and Sports Medicine give him a perspective that's rare in the performance world: he understands not just how adult athletes perform, but how developing bodies grow, adapt, and respond to training load. That clinical foundation is the backbone of everything we do at Functional Precision.
Combined with certifications from the Titleist Performance Institute, OnBaseU, and RacquetFit, Dr. Rettig brings a multi-sport, science-first approach to every athlete he works with.
Every elite athlete is built, not born. Our mission is to give every competitive athlete the tools, knowledge, and precision training to become the best version of themselves.
— Dr. Rettig, Founder
What Drives Us
Our Approach
01
Science-Driven Methodology
You receive a comprehensive 60–120 minute session utilizing the OnBaseU (Fastpitch and Hitting), RacquetFit (Tennis Serve) and TPI (Golf) and fitness screens to identify physical limitations in mobility, stability, and motor control.
02
Objective Analysis
Review of the athlete's serve, swing or pitching mechanics with 2D analysis, 3D analysis for hitting and golf and a detailed explanation of their "Body-Swing-Connection."
03
Tailored to the Athlete
Customized corrective training plans: Based on the initial assessment, a personalized plan will be created to address the identified physical limitations. This will include corrective exercises, mobility drills, and strength training recommendations.
Ready to Train with Precision?
Book your initial assessment with Dr. Rettig and discover what science-backed athletic development can do for your performance.