Former UCLA players Clark and McNeill participated in a UCLA study . The protein tau , linked to a brain disease , was found in both of their brains . Fred McNeill has early-stage dementia ; McNeill does not . Researchers say other variables may come into play when it comes to the disease .
Former NFL players Wayne Clark and Fred McNeill participated in a UCLA study . The protein tau , linked to a brain disease , was found in both of their brains . McNeill has early-stage dementia ; Clark does not . Researchers say other variables may come into play when it comes to the disease .