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Marshawn Kneeland Diagnosed With Stage 1 CTE After Death
Former Cowboys defensive lineman Marshawn Kneeland was posthumously diagnosed with Stage 1 chronic traumatic encephalopathy (CTE) following his death in 2025 at age 24. Researchers at the Boston University CTE Center identified the disease after analyzing his brain tissue. Kneeland's family said they shared the diagnosis to raise awareness about the long-term effects of repeated head impacts in contact sports.
By Sauvik Banerjee




