FILE – In this Dec. 26, 1976, file photo, Oakland Raiders quarterback Ken Stabler is tackled by Pittsburgh Steelers’ Mike Wagner for a 12-yard loss during the first period of the AFC championship NFL football game in Oakland, Calif. Stabler, the late NFL MVP and Super Bowl winner who is a finalist for the Pro Football Hall of Fame, has been diagnosed with the brain disease CTE, Boston University researchers say. (AP Photo/File)