[2] During that time, he was one of 11 players to appear in all four of the Vikings' Super Bowls (IV, VIII, IX, XI).
[4] Hilgenberg died at age 66 in 2008, after battling amyotrophic lateral sclerosis or Lou Gehrig's disease [2] for several years.
After his death, brain dissection found advanced chronic traumatic encephalopathy (CTE), which mimics many ALS symptoms.
He was one of at least 345 NFL players to be diagnosed after death with this disease, which is caused by repeated hits to the head.
This biographical article relating to an American football linebacker born in the 1940s is a stub.