Ultrasound study of elbow ulnar collateral ligament changes in collegiate baseball players: A pilot study.

Objective: To assess changes in elbow ulnar collateral ligament length in college baseball pitchers over the course of a single season.

Design: Cohort Feasibility Study.

Methods: Diagnostic ultrasound was used to assess both the dominant and non-dominant medial elbow joint space in four pitchers and five fielders and compared to in-game pitching data.