Abstract：
UNASSIGNED: The ulnar collateral ligament (UCL) is essential for elbow stability during pitching. In professional baseball, the fastball (FB) is the most commonly used pitch, making postrecovery FB performance after UCL reconstruction (UCLR) a crucial aspect to consider.
UNASSIGNED: (1) Pitchers undergoing UCLR would show no significant changes in performance metrics compared with nonoperated pitchers with similar FB velocity and spin rate, and (2) no significant variance would be found in these metrics within the operated pitchers concerning their preinjury anthropometric characteristics and pitching performance metrics.
UNASSIGNED: Cohort study; Level of evidence, 3.
UNASSIGNED: The study included 91 Major League Baseball (MLB) pitchers who underwent primary UCLR between January 1, 2015, and December 31, 2021. A matched 1:1 control group of MLB pitchers without UCLR injuries was established. Publicly available pitch metrics and anthropometric data were compared between the study and control groups.
UNASSIGNED: Disparities in several performance metrics emerged during the first postreturn year (PRY1), including FB use percentage (P = .029), fielder independent pitching (FIP) (P = .021), and standardized FB runs above average per 100 pitches (wFB/C) (P < .001). Subgroup analysis within the UCLR group revealed a negative correlation between presurgery mean FB velocity and its subsequent change (P < .001) and a positive correlation with changes in FIP (P = .025) from the index year to PRY1. A negative correlation was observed between FB use percentage in the index year and its change by PRY1 (P = .002). By the second postreturn year, no significant differences were found in these performance metrics. No factors were significantly related to prolonged recovery time.
UNASSIGNED: Although FB velocity and spin rate remained consistent, significant differences were observed in FB use percentage, FIP, and wFB/C in PRY1. However, by second postreturn year, these differences were no longer significant. No specific risk factors were identified concerning prolonged recovery time between pre-UCLR FB pitching metrics and the physical anthropometric data. These results suggest that although the short-term postsurgery period may affect more specialized pitching metrics, the basic pitching performance metrics, as hypothesized, remain largely unaffected by UCLR.
UNASSIGNED: (1) Pitchers undergoing UCLR would show no significant changes in performance metrics compared with nonoperated pitchers with similar FB velocity and spin rate, and (2) no significant variance would be found in these metrics within the operated pitchers concerning their preinjury anthropometric characteristics and pitching performance metrics.
UNASSIGNED: Cohort study; Level of evidence, 3.
UNASSIGNED: The study included 91 Major League Baseball (MLB) pitchers who underwent primary UCLR between January 1, 2015, and December 31, 2021. A matched 1:1 control group of MLB pitchers without UCLR injuries was established. Publicly available pitch metrics and anthropometric data were compared between the study and control groups.
UNASSIGNED: Disparities in several performance metrics emerged during the first postreturn year (PRY1), including FB use percentage (P = .029), fielder independent pitching (FIP) (P = .021), and standardized FB runs above average per 100 pitches (wFB/C) (P < .001). Subgroup analysis within the UCLR group revealed a negative correlation between presurgery mean FB velocity and its subsequent change (P < .001) and a positive correlation with changes in FIP (P = .025) from the index year to PRY1. A negative correlation was observed between FB use percentage in the index year and its change by PRY1 (P = .002). By the second postreturn year, no significant differences were found in these performance metrics. No factors were significantly related to prolonged recovery time.
UNASSIGNED: Although FB velocity and spin rate remained consistent, significant differences were observed in FB use percentage, FIP, and wFB/C in PRY1. However, by second postreturn year, these differences were no longer significant. No specific risk factors were identified concerning prolonged recovery time between pre-UCLR FB pitching metrics and the physical anthropometric data. These results suggest that although the short-term postsurgery period may affect more specialized pitching metrics, the basic pitching performance metrics, as hypothesized, remain largely unaffected by UCLR.
摘要：
■尺侧副韧带（UCL）对于俯仰时的肘部稳定性至关重要。在职业棒球中，快球(FB)是最常用的音高，使UCL重建（UCLR）后的恢复后FB性能成为需要考虑的关键方面。
■（1）与具有相似FB速度和旋转速率的非操作投手相比，进行UCLR的投手的性能指标没有显着变化，（2）在受伤前的人体测量特征和投球性能指标方面，在这些指标中没有发现显着差异。
■队列研究；证据水平，3.
■该研究包括91名美国职业棒球大联盟（MLB）投手，他们在2015年1月1日至2021年12月31日期间接受了主要的UCLR。建立了无UCLR损伤的MLB投手的匹配的1：1对照组。在研究组和对照组之间比较了公开的音高指标和人体测量数据。
■在第一个后年度（PRY1）出现了几个绩效指标的差异，包括FB使用百分比（P=0.029），外野手独立投球（FIP）（P=.021），标准化FB每100个音高高于平均水平（wFB/C）（P<.001）。UCLR组中的亚组分析显示，从指标年到PRY1，手术前平均FB速度与其随后的变化之间呈负相关（P<.001），与FIP变化呈正相关（P=.025）。指数年的FB使用百分比与PRY1的变化之间呈负相关（P=.002）。到第二个后年，在这些性能指标中没有发现显著差异.没有因素与延长恢复时间显着相关。
■尽管FB速度和自旋速率保持一致，观察到FB使用百分比存在显著差异，FIP,和wFB/C在PRY1。然而,到第二年后，这些差异不再显著.在UCLR前FB俯仰指标和身体人体测量数据之间，没有发现有关延长恢复时间的特定风险因素。这些结果表明，尽管手术后的短期时间可能会影响更专门的投球指标，基本的投球性能指标，正如假设的那样，基本上不受UCLR的影响。
■（1）与具有相似FB速度和旋转速率的非操作投手相比，进行UCLR的投手的性能指标没有显着变化，（2）在受伤前的人体测量特征和投球性能指标方面，在这些指标中没有发现显着差异。
■队列研究；证据水平，3.
■该研究包括91名美国职业棒球大联盟（MLB）投手，他们在2015年1月1日至2021年12月31日期间接受了主要的UCLR。建立了无UCLR损伤的MLB投手的匹配的1：1对照组。在研究组和对照组之间比较了公开的音高指标和人体测量数据。
■在第一个后年度（PRY1）出现了几个绩效指标的差异，包括FB使用百分比（P=0.029），外野手独立投球（FIP）（P=.021），标准化FB每100个音高高于平均水平（wFB/C）（P<.001）。UCLR组中的亚组分析显示，从指标年到PRY1，手术前平均FB速度与其随后的变化之间呈负相关（P<.001），与FIP变化呈正相关（P=.025）。指数年的FB使用百分比与PRY1的变化之间呈负相关（P=.002）。到第二个后年，在这些性能指标中没有发现显著差异.没有因素与延长恢复时间显着相关。
■尽管FB速度和自旋速率保持一致，观察到FB使用百分比存在显著差异，FIP,和wFB/C在PRY1。然而,到第二年后，这些差异不再显著.在UCLR前FB俯仰指标和身体人体测量数据之间，没有发现有关延长恢复时间的特定风险因素。这些结果表明，尽管手术后的短期时间可能会影响更专门的投球指标，基本的投球性能指标，正如假设的那样，基本上不受UCLR的影响。
