Former Cowboys DE Marshawn Kneeland Diagnosed With Stage 1 CTE Posthumously

Former Dallas Cowboys defensive end Marshawn Kneeland has been posthumously diagnosed with Stage 1 chronic traumatic encephalopathy (CTE), according to researchers at Boston University’s CTE Center and the Concussion & CTE Foundation. Kneeland, 24, died in November 2025 from a self-inflicted gunshot wound after his family donated his brain for research. The diagnosis was announced […]
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