Ex-NFL star Jim McMahon was nearly driven to suicide by headaches from too many head blows – The Virginian-Pilot
Ex Bears QB Jim McMahon opens up about dementia – Twin Cities
Jim McMahon, other NFL veterans push for marijuana as painkiller – New York Daily News
Pushing drugs in the NFL locker room
He was in a league of his own': Why the legend of Jim McMahon will never fade - The Athletic
Did Jim McMahon's concussions cause dementia? - Deseret News
Watch Dean Cain on Concussions in the NFL, Darryl Talley - Bloomberg
Does Football Have a Future?