The Bennett lesion is an extraarticular ossification of the posteroinferior quadrant of the glenoid. The lesion may be a source of shoulder pain in throwing athletes. The Bennett lesion may be caused by traction on the posterior band of the inferior glenohumeral ligamentous complex produced by posteroior subluxation during cocking, posterior subluxation during cocking, posterior decelerate forces during follow-through, or a combination of the two. Treatment is usually conservative and focused at the associated intraarticular abnormality and pathomechanics.