Our mission.

Here at Graff, our mission is simple. We want to enable athletes to have access to data and analytics that will help them fully understand their games like never before.

How it all started.


In 2018, three Johns Hopkins University student-athletes came together to accomplish an ambitious goal: bring athletes the analytics that they deserve. The idea struck them after years of trying to improve at different sports without an efficient path to getting better. So they made it their mission to bring analytics and insight into athlete’s training programs in a more accessible, affordable and efficient way.

Team Graff


Aaron Shapiro
Co-Founder & CEO

Aaron is an experienced entrepreneur and an economics major at JHU. Coming up with the idea for Graff at the age of 13, he is set on seeing his company vision through.


Mike Eberle
Co-Founder & CTO

Mike is a JHU graduate with a degree in computer science. Proficient in full-stack development, Mike now serves as the CTO of Graff.


Patrick Kelly
Co-Founder & CPO

Patrick, also a JHU graduate, has a degree in electrical engineering. As CPO, PK is the leader of all developments on electronic components inside our ball.


Rowen Frazer
Chief Design Officer

Rowen is a design director and branding expert with 13 years experience. He champions the Graff design language across all efforts internal & external.


Sean Fairholm
VP of Content Development

Sean is a PGA professional and writer for Global Golf, having covered the sport for 10 years. He leads all content creation.


Parker Feldmann
VP of Manufacturing

With a stellar resume including Tesla & Hamilton, Parker leads all hardware, manufacturing & supply chain efforts at Graff. An engineering wizard with a creative spirit, Parker cites his time in the U.S. Air Force as the most integral part of developing his drive and work ethic.

Our inspiration.


Jim Margraff
Jim was the head football coach at Johns Hopkins from 1990 to 2018. He was our coach, our leader and most of all our mentor. The tenets that Jim instilled in us on the field have resonated deeply in our lives off the field. When we reflect on the many lessons we learned from him, we find that they are the same lessons that guide us through our journey of running this company. In his memory, Graff is both a nod to our math-based technology and also to Jim's surname.

If not now, when?
One of Coach Margraff's most powerful mantras was one of seizing opportunities. INNW summarizes our approach to our company vision. Tech integration into sports is imminent and there is no sense in wasting time. Our technology is ready, our team is ready, and athletes who can benefit from our product are surely ready. The mantra gives us the confidence to press on with the optimism needed to bring a product to market that has not yet been successfully debuted into golf.

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