He sprained/tore 'ligaments' in his knee.
(..) The remodeling of the ischia and both clavicles indicate it was incurred over the course of the last decade. SAROYAN: You're right-- the acromioclavicular ligament shows signs of repeated dislocation. I'm also seeing signs of expanded articulation of the glenoid fossae. (..)2015 TvShow: Bones Title: The Promise in the Palace Season: 11 Episode 7