What was the nickname of the footballer whose brain injuries got significant attention in the film League of Denial ?
League of Denial:  The book and film devote significant attention to the story of Mike Webster and his football-related brain injuries, and the pathologist who examined Webster's brain, Bennet Omalu. Mike Webster:  Nicknamed "Iron Mike", Webster anchored the Steelers' offensive line during much of their run of four Super Bowl victories from 1974 to 1979 and is considered by some as the best center in NFL history.
"Iron Mike"