Review Question - QID 211359

A 22-year-old male professional baseball player presents with worsening right groin pain. He has a history significant for a slipped capital femoral epiphysis requiring in-situ pinning and then hardware removal several years later. On examination, the patient has a painless range of motion but symptoms reproducible with combined flexion, adduction, and internal rotation. There was no tenderness over the anterior hip joint and no pain with resisted hip flexion. Figures A through D are the current images. What is the most likely cause of this patient's hip pain?