UCL Reconstruction and Its Effects on Professional Baseball Pitchers: An Analysis of Spin Rate

Abstract

This study delves into the realm of Tommy John surgery, a procedure aimed at reconstructing the ulnar collateral ligament (UCL) of the elbow, and its impact on the performance of baseball pitchers post-surgery. The study aims to evaluate the efficacy of UCL reconstruction in restoring player functionality and performance in professional baseball. The analysis employs sabermetric statistics such as strikeouts per nine (K/9), earned run average (ERA), and spin rate to assess player performance post-surgery. Originating in 1974 with its namesake, professional baseball player Tommy John, the surgery has become synonymous with UCL reconstruction, raising concerns among surgeons and medical professionals regarding its growing acceptance among younger athletes. By implementing linear regression analysis, the researcher was able to show some evidence that a higher spin rate leads to more deceptive pitches complimenting statistics like K/9 and ERA. This trend echoes past instances of athletes risking their health, as seen with the use of performance-enhancing drugs, in pursuit of competitive advantage and increased economic value.