About

Built by two pitchers who lived the problem

Athlete Engine didn't come from a lab or a boardroom. It came from the bullpen.

The team

Two pitchers, one platform

Jackson Thielen
Jackson Thielen
Founder & President

Pitched at Gustavus Adolphus, winning two championships in three years, before finishing his career at the University of San Francisco. Has been coaching for 6+ years and holds a BA in Accounting & Finance and an MS in Entrepreneurship & Innovation. Started developing Athlete Engine in May 2026.

Hunter Holzemer
Hunter Holzemer
Co-Founder, App Developer

A standout four-year pitcher at the University of San Francisco who went on to compete in the MLB Draft League in 2025–26, and holds a BA in Finance. Hunter drives Athlete Engine's coaching tools and day-to-day product, shaping the platform around how real staffs run their programs.

Athlete Engine was founded by two college pitchers who spent years watching teammates lose seasons to arm injuries that, with the right information, might have been caught early.

Throwing at Gustavus Adolphus and then the University of San Francisco, the same gap kept showing up: nobody had a simple way to connect how a pitcher felt, how they trained, and how they performed. Workload lived in a spreadsheet. Arm care lived on a whiteboard. Wellness lived in someone's memory. The data existed — it just never came together in time to matter.

"If we could see the whole picture in one place, we could keep guys healthy and help them get better. So we built it."

Today Athlete Engine is a full mobile platform — built with input from active college and professional players — designed for the programs that don't have a seven-figure analytics budget but care just as much about their pitchers. D2, D3, NAIA, JUCO, high school, and private facilities. The arms that too often get overlooked.

The mission is simple: keep arms healthy, help pitchers get better, and give coaches the full picture — with minimal time and effort.

Built by players

Every feature is shaped by people who've actually been on the mound and in the training room.

Health first

Performance matters, but healthy arms come first. Injury prevention is the foundation of everything we build.

Outcomes over features

We don't measure success in dashboards. We measure it in healthy seasons and better pitchers.

Join us early

We're working with a small group of programs to get this right. Yours could be one of them.

Book a Demo