Marshawn Kneeland Posthumously Diagnosed With Stage 1 CTE

Former Dallas Cowboys defensive end Marshawn Kneeland has been posthumously diagnosed with stage 1 CTE following his death by suicide in November 2025 at age 24. Medical experts confirmed the diagnosis via postmortem brain analysis, as announced by his family and the Concussion & CTE Foundation. His case highlights the ongoing concerns regarding the long-term physical impacts of professional football, with experts noting that such findings in young players are unfortunately not rare.