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First published on May 18, 2004, doi:10.1177/0363546503262166
This version was published on July 1, 2004
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The American Journal of Sports Medicine 32:1158-1164 (2004)
© 2004 American Orthopaedic Society for Sports Medicine

Ulnar Collateral Ligament Reconstruction in High School Baseball Players

Clinical Results and Injury Risk Factors

Damon H. Petty, MD, James R. Andrews, MD, Glenn S. Fleisig, PhD* and E. Lyle Cain, MD

From the American Sports Medicine Institute, Birmingham, Alabama

* Address correspondence to Glenn S. Fleisig, PhD, American Sports Medicine Institute, 1313 13th Street South, Birmingham, AL 35205 (e-mail: glennf{at}asmi.org).

Background: The incidence of ulnar collateral ligament injury has increased in baseball, especially at the high school level.

Hypothesis: Ulnar collateral ligament injury in high school baseball players is associated with overuse, high-velocity throwing, early throwing of breaking pitches, and improper warm-ups.

Study Design: Retrospective cohort study.

Methods: Follow-up physical examination and questionnaire data were collected at an average of 35 months after ulnar collateral ligament reconstruction from 27 former high school baseball players. Six potential risk factors were evaluated: year-round throwing, seasonal overuse, event overuse, throwing velocity more than 80 mph, throwing breaking pitches before age 14, and inadequate warm-ups.

Results: Overall, 74% returned to baseball at the same or higher level. Patients averaged 3 potential risk factors, and 85% demonstrated at least one overuse category. Of the pitchers, the average self-reported fastball velocity was 83 mph, and 67% threw breaking pitches before age 14.

Conclusions: The success rate of ulnar collateral ligament reconstruction in high school baseball players is nearly equal to that in more mature groups of throwers. Overuse of the throwing arm and throwing breaking pitches at an early age may be related to their injuries. Special attention should be paid to elite-level teenage pitchers who throw with high velocity.

Key Words: pitcher • overuse • curveball • velocity • elbow




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