Pitcher Greeks: First Principles, Stuff Models, and Derivatives
Aug 30, 2026·
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0 min read
Aidan Resnick

Authors
Quantitative Trader · Baseball Researcher
I’m a quantitative trader at Chicago Trading Company and a baseball
researcher in my free time. My recent work develops “pitcher greeks”:
continuous, differentiable stuff models whose sensitivities show how run
value responds to changes in a pitch’s velocity, movement, and approach
angles.