Effect of Ulnar Collateral Ligament Reconstruction on Performance in Major League Baseball Pitchers: A 2-Year Analysis of Advanced Pitching Statistics, Velocity, and Spin Rate

Matthew Quinn, Jonathan Ge, Joseph Ham, Benjamin Ahn, Albert Wu, John D. Milner, Nicholas J. Lemme, Brett D. Owens, Nikhil N. Verma
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Abstract

Background: Ulnar collateral ligament reconstruction (UCLR) is a common procedure for Major League Baseball (MLB) pitchers, with a rising incidence and significant financial and performance implications. However, the effect of UCLR on postinjury pitching performance remains controversial, particularly regarding advanced metrics such as spin rate and velocity. Purpose: To evaluate changes in pitching performance after UCLR and the association between pitch velocity, spin rate, and performance. Study Design: Case-control study; Level of evidence, 4. Methods: A total of 43 MLB pitchers who underwent UCLR between 2017 and 2021 were compared with 86 uninjured age-matched controls. Pitching metrics, including fielding independent pitching, skill-interactive earned run average, and walks plus hits per inning pitched, as well as pitch-specific velocity and spin rate were analyzed for 2 seasons before and at least 1 season after UCLR. Principal component analysis was used to assess overall performance. Results: Pitchers showed a significant decline in overall performance during the first season after UCLR ( P = .032) but returned to preinjury levels by the second season ( P = .287). There was a significant decrease in the off-speed pitch spin rate observed in the first season ( P = .041), but all other pitches demonstrated no significant change throughout the study period. Increases in fastball velocity ( P = .046), fastball spin rate ( P = .019), and off-speed pitch velocity ( P = .016) were associated with superior overall performance. Conclusion: The current study demonstrated that while pitchers experienced a significant decline in performance during the first season after UCLR, most of those who returned for a second season returned to their baseline preinjury performance. Additionally, increased velocity and spin rate were associated with improved performance in both injured and healthy pitchers, highlighting the value of these metrics in evaluating overall pitching performance.
尺侧副韧带重建对美国职业棒球大联盟投手表现的影响:一项为期2年的高级投球统计数据、速度和旋转速率分析
背景:尺侧副韧带重建(UCLR)是美国职业棒球大联盟(MLB)投手的常见手术,其发病率不断上升,并对经济和表现产生重大影响。然而,UCLR对伤后投球表现的影响仍然存在争议,特别是在旋转速率和速度等高级指标方面。目的:评价UCLR术后俯仰表现的变化,以及俯仰速度、自旋速率和俯仰表现之间的关系。研究设计:病例对照研究;证据等级,4级。方法:在2017年至2021年期间,共有43名MLB投手接受了UCLR,与86名未受伤的年龄匹配的对照组进行了比较。投手指标,包括外场独立投球,技能互动自责分平均数,每局保送加安打,以及投球特定速度和旋转率,在UCLR之前的两个赛季和之后的至少一个赛季进行了分析。主成分分析用于评估整体表现。结果:投手在UCLR后的第一个赛季整体表现明显下降(P = .032),但在第二个赛季恢复到伤前水平(P = .287)。在第一个赛季中观察到的慢速球旋转率显著下降(P = .041),但在整个研究期间,其他所有球都没有显着变化。快速球速度(P = 0.046)、快速球旋转速度(P = 0.019)和慢速投球速度(P = 0.016)的增加与出色的整体表现相关。结论:目前的研究表明,虽然投手在UCLR后的第一个赛季表现明显下降,但大多数回归第二个赛季的投手恢复到他们受伤前的基线表现。此外,速度和旋转速度的增加与受伤和健康投手的表现改善有关,突出了这些指标在评估整体投球表现方面的价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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