MD · MS · CSCS — Sports Science & Performance

Human performance,
read like a physician.

I’m Mauro Castillo. Physician, sports scientist, and strength & conditioning coach. I’ve trained pro athletes in baseball and basketball, and I build the AI systems that run fitness businesses.

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2025 Carolina League S&C Coach of the Year Jupiter, Florida Applied AI
Experience
Texas Rangers Cressey Sports Performance Texas Legends STI CrossFit Texas Rangers Cressey Sports Performance Texas Legends STI CrossFit Texas Rangers Cressey Sports Performance Texas Legends STI CrossFit
The lens

Three disciplines,
one way of seeing the body.

MD

Medical Doctor

Physiology and the human body, understood at a clinical level of detail.

MS

Master of Science

Trained to read the evidence and design method that holds up.

CSCS

Strength & Conditioning

Certified programming built for athletes under real load.

Capabilities

One person,
four toolboxes.

Most staffs split these across four hires. I work across all of them, and they sharpen each other.

Clinical The MD lens on every training decision.

Clinical & Medical

  • Physiology and pathophysiology at a clinical level
  • Injury context, red flags, and return-to-play thinking
  • Reading, appraising, and applying the research
S&C On-floor coaching in pro environments.

Strength & Conditioning

  • Program design and periodization for team-sport athletes
  • Day-to-day coaching in pro baseball and basketball settings
  • Testing, monitoring, and load management that coaches actually use
Sport Sci From raw signal to a decision.

Sports Science & Data

  • Force plates, GPS, and velocity: VALD, Catapult, Kinexon, 1080 Motion
  • AMS platforms (Teamworks) as the daily operating layer
  • Turning monitoring data into answers a coach can act on
AI I don’t just use the tools. I build them.

AI & Software

  • LLM agent systems designed and shipped end to end
  • Agentic coding with Anthropic Claude Code and OpenAI Codex
  • Automation pipelines that glue a team’s stack together (n8n)
Tools I work with
VALDCatapult1080 MotionTeamworksKinexonAMS platformsAnthropic Claude CodeOpenAI Codexn8nLLM AgentsRailwayVercel
Selected work

A sample of what
I’ve built and written.

See all work
Concept & Build Working demo

Readiness

An AI morning brief for a performance department. It reads the force-plate and workload data a staff already collects and posts one prioritized message to Slack — who to review, and why. Surfaces, never diagnoses.
Concept & Build Live app

NBA Workload Monitor

A live dashboard that flags NBA players entering risky workload windows — schedule congestion, minute spikes against their own baseline, ramp-ups after a layoff. Real box-score data, deterministic flags, every number tested. Open source, with a deliberate case for retiring the ACWR.

2026
Founder & Builder Live

Cero OS

An autonomous AI system that runs the front office of independent gyms — answering leads, re-engaging members, and reporting to the owner. Designed, built, and deployed end to end.
Strength & Conditioning Coach MiLB

Texas Rangers

S&C coach in the Rangers' minor-league system. Named 2025 Carolina League Strength & Conditioning Coach of the Year.

S&C & Sports Science Fellow NBA G League

Texas Legends

Fellowship in strength & conditioning and sports science with the Dallas Mavericks' NBA G League affiliate.

Athlete Development Baseball

Cressey Sports Performance

Athlete development at one of baseball's most respected performance facilities.

Author Kindle

Prompting for Performance

The AI Playbook for S&C Coaches, Vol 1. A practical guide to putting AI to work in strength & conditioning.
Mauro Castillo, MD — headshot
About

I’m a physician who coaches. I earned an MD, a master’s in science, and a CSCS, then took all three onto the field.

On the performance side: strength & conditioning coach in the Texas Rangers organization, where I was named 2025 Carolina League Strength & Conditioning Coach of the Year. A fellowship in strength & conditioning and sports science with the Texas Legends, the Dallas Mavericks’ G League affiliate. Athlete development at Cressey Sports Performance.

On the systems side: I wrote Prompting for Performance, the AI playbook for S&C coaches, and I build AI software for the fitness industry. I don’t just specify systems, I design and ship them.

Dominican-born, based in Jupiter, Florida. This is where I keep the work I’m proud of and the ideas I’m still testing.