The Arm by Jeff Passan

Inside the Billion-Dollar Mystery of the Most Valuable Commodity in Sports

A probing, narrative exploration of how baseball’s pitching arm has been remade by science, medicine, analytics and economics, tracing the history of pitching injuries from the mound to the operating room. Through reporting, interviews and profiles of pitchers, doctors and agents, it explains Tommy John surgery, biomechanics, youth overuse, and the forces — incentives, technology and culture — that have driven higher velocity and more frequent injuries. The book argues that a medical‑industrial complex has grown up around arms and calls for reforms to protect players and preserve the future of the sport.

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