FILE - In this Dec. 27, 1976, file photo, Oakland Raiders quarterback Ken Stabler stands on the sidelines during the second half of AFC championship game against the Pittsburgh Steelers in Oakland, Calif. Boston researchers say Stabler had the brain disease CTE. Boston University confirmed the diagnosis Wednesday, Feb. 3, 2016. Stabler, who died of colon cancer at 69 in July 2015, had Stage 3 chronic traumatic encephalopathy, Dr. Ann McKee told The Associated Press. McKee said the disease was widespread throughout his brain, with "severe" damage to the regions involving learning, memory and regulation of emotion. (AP Photo/File)