Radial Shaft Stress Fracture in a Major League Pitcher

Area of Science:

• Sports Medicine
• Orthopedics
• Biomechanics

Background:

• Overuse injuries are common in throwing athletes, with a focus on prevention and diagnosis.
• Upper extremity stress fractures are infrequent but can cause significant morbidity.
• Radial shaft stress fractures are particularly rare in this population.

Observation:

• A Major League Baseball pitcher experienced a stress fracture of the lateral cortex of the radius.
• The injury occurred after the athlete attempted to develop a new pitch.
• The supinator muscle's contractile forces are the suspected cause.

Findings:

• This case represents the first reported instance of a radial shaft stress fracture in a throwing athlete.
• The injury mechanism is linked to the biomechanical demands of pitching and muscle exertion.
• The lateral cortex of the radius was affected.

Implications:

• Highlights the potential for unusual stress fractures in elite throwing athletes.
• Suggests considering radial shaft stress fractures in pitchers with specific overuse symptoms.
• Emphasizes the need for tailored injury prevention strategies considering muscle forces and new pitching techniques.