Departments of Orthopaedic Surgery and Sports Medicine, Stanford University, Redwood City, CA, USA.
Department of Exercise and Sport Science, Eastern Kentucky University, Richmond, KY, USA.
J Shoulder Elbow Surg. 2022 Aug;31(8):1563-1570. doi: 10.1016/j.jse.2022.02.026. Epub 2022 Mar 26.
Ulnar collateral ligament (UCL) tears are prevalent in Major League Baseball (MLB) pitchers and can cause significant loss of time with varying reports of impact on performance. Revision UCL reconstruction (UCLR) is becoming increasingly common, with little known about the effects on fastball (FB) velocity and usage (FB%) in this setting.
HYPOTHESIS/PURPOSE: The purpose was to evaluate the effect of revision UCLR on MLB pitchers with respect to postoperative FB velocity and FB% at 1 and 2 years after return to play. The hypothesis was postoperative FB velocity and FB% would significantly decrease vs. prerevision levels, and that revision UCLRs would result in significantly decreased FB velocity and FB% in comparison to a matched group of MLB pitchers after primary UCLR.
Twenty-one pitchers who underwent revision UCLR and returned to MLB play were identified from public records from 2008-2021. The PITCHf(x) system collected FB velocity for 4-seam (4FB) and 2-seam (2FB) fastballs and total FB% for pitchers in the prerevision year as well as the 2 years after return. A matched control group of pitchers who underwent primary UCLR was used for comparison.
There were no significant differences in FB velocity between prerevision levels (4FB 92.9 mph, 2FB 91.4 mph) and years 1 (4FB 92.5 mph, 2FB 91.2 mph) and 2 (4FB 93.4 mph, 2FB 91.1 mph) after revision UCLR. FB% decreased from the prerevision season (60.1) and the first (56.2, P = .036) and second years (52.5, P = .002) after return. There were no significant differences between FB velocity and FB% or between the revision and primary UCLR groups.
Pitchers returning to the MLB level after revision UCLR can expect similar FB velocity to their prerevision FB velocity and to pitchers undergoing primary UCLR; however, they do demonstrate a decrease in FB%, which may suggest less confidence in their FB after RTP.
美国职棒大联盟（MLB）投手中普遍存在肘外侧韧带（UCL）撕裂，这可能导致大量时间的损失，并且对表现的影响也有不同的报告。修复 UCL 重建（UCLR）越来越常见，但在这种情况下，关于术后快速球（FB）速度和使用率（FB%）的了解甚少。
假设/目的：本研究旨在评估 MLB 投手在接受 UCLR 修复术后，在重返赛场后的 1 年和 2 年时，术后 FB 速度和 FB%的影响。假设术后 FB 速度和 FB%与术前相比会显著下降，并且与接受初次 UCLR 的 MLB 投手相比，UCLR 修复术后的 FB 速度和 FB%会显著下降。
从 2008 年至 2021 年的公开记录中，确定了 21 名接受 UCLR 修复术并重返 MLB 比赛的投手。PITCHf(x) 系统收集了 4 缝线（4FB）和 2 缝线（2FB）快速球的 FB 速度，以及投手在术前年以及术后 2 年的总 FB%。使用接受初次 UCLR 的匹配对照组投手进行比较。
在 UCLR 修复术后，术前水平（4FB 92.9 mph，2FB 91.4 mph）与术后 1 年（4FB 92.5 mph，2FB 91.2 mph）和 2 年（4FB 93.4 mph，2FB 91.1 mph）的 FB 速度之间没有显著差异。术后第 1 年（56.2，P=0.036）和第 2 年（52.5，P=0.002）FB%均低于术前赛季。FB 速度和 FB%之间或修复组和初次 UCLR 组之间没有显著差异。
接受 UCLR 修复术后重返 MLB 水平的投手可以预期他们的 FB 速度与术前的 FB 速度相似，与接受初次 UCLR 的投手相似；然而，他们确实表现出 FB%的下降，这可能表明他们在重返赛场后对 FB 的信心不足。
