职业棒球中从内野手或外野手转为投手的球员的受伤率与一直担任投手的球员有差异吗？
Do Injury Rates in Position Players Who Convert to Pitchers in Professional Baseball Differ From Players Who Have Always Been Pitchers?
作者信息
Erickson Brandon J, Chalmers Peter N, D'Angelo John, Ma Kevin, Rowe Dana, Ahmad Christopher S
机构信息
Rothman Orthopaedic Institute, New York, New York, USA.
Department of Orthopaedic Surgery, University of Utah, Salt Lake City, Utah, USA.
出版信息
Orthop J Sports Med. 2021 Oct 25;9(10):23259671211050963. doi: 10.1177/23259671211050963. eCollection 2021 Oct.
BACKGROUND
There are some professional baseball players who begin their career as a position player and later convert to a pitcher; injury rates in these players are unknown.
PURPOSE
To compare injury rates of professional baseball players who started their career as position players and converted to pitchers with a control group of pitchers who have been only pitchers throughout their professional career.
HYPOTHESIS
Injury rates would be lower in the conversion players.
STUDY DESIGN
Cohort study; Level of evidence, 3.
METHODS
All players who began their professional baseball career as position players and converted to pitchers between 2011 and 2018 were included. All injuries that occurred after they converted to pitchers were included. The conversion players were matched 1 to 1 with a control group of pitchers who entered professional baseball as pitchers and never changed position. Injury rates were compared between groups. The performance between groups was also compared.
RESULTS
Overall, 221 players were identified who converted from position players to pitchers. There were significantly more injuries per year in the control pitcher group (0.8 ± 0.9) than in the conversion pitcher group (0.7 ± 0.9; = .015). Injuries in the control group resulted in 61 ± 112 days missed per injury, while injuries in the conversion player group resulted in 54 ± 102 days missed per injury ( = .894). Injury characteristics differed between groups. However, in both groups, most of the injuries were related to pitching or throwing, were noncontact or gradual overuse injuries, and involved the upper extremity. Converted pitchers had lower pitcher usage, with fewer games and innings pitched ( < .001), with significantly worse statistics for walks plus hits per inning pitched ( = .018).
CONCLUSION
Professional baseball players who convert from position players to pitchers are injured at lower rates than control pitchers. Conversion pitchers have lower pitcher usage, which may contribute to their reduced injury rates.
背景
有些职业棒球运动员以守备球员身份开启职业生涯，后来转型成为投手；这些球员的受伤率尚不清楚。
目的
比较以守备球员身份开启职业生涯并转型为投手的职业棒球运动员与整个职业生涯都只是投手的对照组投手的受伤率。
假设
转型球员的受伤率会更低。
研究设计
队列研究；证据等级，3级。
方法
纳入所有在2011年至2018年间以守备球员身份开启职业棒球生涯并转型为投手的球员。纳入他们转型为投手后发生的所有伤病。转型球员与作为投手进入职业棒球界且从未改变位置的投手对照组进行1:1匹配。比较两组之间的受伤率。还比较了两组之间的表现。
结果
总体而言，共识别出221名从守备球员转型为投手的球员。对照组投手每年的受伤次数（0.8±0.9）显著多于转型投手组（0.7±0.9；P = 0.015）。对照组的伤病导致每次受伤缺勤61±112天，而转型球员组的伤病导致每次受伤缺勤54±102天（P = 0.894）。两组的受伤特征有所不同。然而，在两组中，大多数伤病都与投球或投掷有关，是非接触性或逐渐累积的过度使用伤病，且累及上肢。转型投手的投球使用率较低，比赛场次和投球局数较少（P < 0.001），每局投球的保送加安打数据明显更差（P = 0.018）。
结论
从守备球员转型为投手的职业棒球运动员的受伤率低于对照组投手。转型投手的投球使用率较低，这可能是他们受伤率降低的原因。
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