Former Cowboys defensive end Marshawn Kneeland had early stage CTE when he died at 24
Former Cowboys Defensive End Marshawn Kneeland Diagnosed with Early-Stage CTE at Age 24 Upon His Death Former Dallas Cowboys defensive end Marshawn Kneeland, who died by suicide in November 2025, had early-stage chronic traumatic encephalopathy (CTE), a brain condition linked to repeated concussions. His family revealed the diagnosis after the Boston University CTE Center analyzed … Read more