Later analysis revealed that Martin had stage 2 chronic traumatic encephalopathy and it had no effect on his cognitive abilities .
Stage 2 chronic traumatic encephalopathy is a disease normally associated with enforcers ; the damage was believed to stem from a severe concussion Martin sustained in 1977 .
Later analysis revealed that Martin had stage 2 chronic traumatic encephalopathy , a disease normally associated with enforcers ; the damage was believed to stem from a severe concussion Martin sustained in 1977 , and it had no effect on his cognitive abilities .