Dwight Clark's Teammate Reflects On His Own Battle With Brain TraumaClark's San Francisco 49ers teammate from 1981 George Visger has been battling brain trauma for decades.
Oxygen Therapy Helping Former NFL Lineman’s Brain DamageFormer NFL lineman George Visger career was cut short by concussions. So he comes to Sacramento's Hyperbaric Oxygen Clinic for treatment of the holes in his brain caused by head trauma from hits during his career.