Dallas Cowboys player Marshawn Kneeland, who died by suicide, was diagnosed with CTE brain disease0

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• July 8, 2026

Research has shown that athletes such as footballers, rugby players, and fighters such as boxers have a significantly higher risk of developing CTE than the general population. CTE can only be diagnosed after death. The disease, caused by repeated blows to the head, has been found in the brains of dozens of former National Football