BEVERLY HILLS, Calif. -- Pro Football Hall of Famers Tony Dorsett and Joe DeLamielleure, and former NFL All-Pro Leonard Marshall have been diagnosed as having signs of chronic traumatic encephalopathy, a degenerative condition many scientists say is caused by head trauma and linked to depression and dementia, doctors have told "Outside the Lines."

The three former stars underwent brain scans and clinical evaluations during the past three months at UCLA, as did an unidentified ex-player whose test results are not yet available. Last year, UCLA tested five other former players and diagnosed all five as having signs of CTE, marking the first time doctors found signs of the crippling disease in living former players.
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