Kneeland CTE Diagnosis

Former Cowboys defensive end Marshawn Kneeland was posthumously found to have stage 1 CTE.

ABC NewsThe GuardianBBC News
Dallas Cowboys player Marshawn Kneeland who died by suicide diagnosed with CTE brain disease
BBC News

Dallas Cowboys player Marshawn Kneeland who died by suicide diagnosed with CTE brain disease

Tragic Diagnosis Made Posthumously to Former Cowboys Defensive End
Townhall

Tragic Diagnosis Made Posthumously to Former Cowboys Defensive End

Former Cowboys defensive end Marshawn Kneeland had early stage CTE when he died at 24
The Guardian

Former Cowboys defensive end Marshawn Kneeland had early stage CTE when he died at 24

Summary

A neutral summary of the key facts most outlets agree on, drawn from reporting across the political spectrum.

Boston University CTE Center researchers posthumously diagnosed Dallas Cowboys defensive end Marshawn Kneeland with Stage 1 chronic traumatic encephalopathy after analyzing brain tissue donated through the Concussion & CTE Foundation. Kneeland died by suicide in November 2025 at age 24 from an apparent self-inflicted gunshot wound after a high-speed police chase in Texas. He was in his second NFL season with Dallas at the time of his death. CTE is associated with repeated head impacts, and Kneeland’s diagnosis was made after death.

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