There is "no question" Ken Stabler had CTE, the doctor that examined the late NFL great's brain after his death last year told ESPN's "Outside the Lines."
CTE, or chronic traumatic encephalopathy, is a degenerative brain disease believed to be caused by repeated blows to the head. Researching the condition is difficult, however, because it can only be diagnosed upon the examination of the brain after death, the sports site noted.
