Hi Rich, My guess would be that his original complaints of weakness were the result of some neurological deficit either central or spinal. The testing done by the physician was enough to tear the weakened muscle (sounds as if it might be pect maj or at least some anteior chest wall muscle) and the brusing you are seeing is the result. Obviously you need to avoid further stressing of the area and make sure that this is a simple ortho condition. Jim %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%