Arm Health in Elite Collegiate Summer League Baseball Players Assessed by the Kerlan-Jobe Orthopaedic Clinic Score

J Athl Train. 2024 Mar 1;59(3):255-261. doi: 10.4085/1062-6050-0123.23.

Abstract

Context: Collegiate baseball players with professional aspirations often participate in summer leagues; foremost among them is the Cape Cod Baseball League (CCBL). Injuries acquired during the collegiate baseball season can be carried into the CCBL season and vice versa.

Objective: To assess the history of throwing arm injury and current functionality in midseason CCBL players.

Design: Cross-sectional study.

Setting: Online questionnaire.

Patients or other participants: A total of 123 CCBL players participated. Qualifying athletes were ≥18 years old and were rostered CCBL players with remaining collegiate eligibility.

Main outcome measure(s): After collecting background information, we used the Kerlan-Jobe Orthopaedic Clinic (KJOC) Shoulder and Elbow questionnaire to assess the history of throwing arm injury and current functionality. The maximum KJOC score is 100.0; higher scores correspond with greater functionality.

Results: The mean KJOC score was 86.6 ± 14.5 (n = 92); 24.5% (23/94) of players reported a prior diagnosis of throwing arm injury other than a strain or sprain. A total of 49 (49/96, 51.0%) players had undergone rehabilitation for a throwing arm injury, and 7 (7/96, 7.3%) had experienced a medical procedure. Players with no previous treatment (n = 41, mean KJOC score = 88.9 ± 19.0) more frequently demonstrated KJOC scores of ≥90 than players with such treatment (n = 55, 80.9 ± 17.1; P < .001). The 18 players with time-loss arm injury in the last year had lower mean KJOC scores (71.3 ± 20.0) than players with no injury or time loss (90.3 ± 9.8; P < .001). Similarly, players who reported current arm trouble (n = 15) had lower KJOC scores (71.6 ± 17.5) than players with healthy arms (89.5 ± 11.9; P < .001).

Conclusions: The average KJOC score of the CCBL players was <90, with particularly low scores in athletes with prior arm injury and treatment.

Keywords: arm injury; collegiate athletics; overuse injury; throwing athletes.

MeSH terms

  • Adolescent
  • Adult
  • Arm
  • Arm Injuries* / diagnosis
  • Baseball* / injuries
  • Cross-Sectional Studies
  • Humans
  • Orthopedics*
  • Seasons
  • Young Adult