Marshawn Kneeland, Cowboys player who died by suicide at 24, diagnosed with CTE

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Marshawn Kneeland, a former Dallas Cowboys player, died by suicide at age 24 and was posthumously diagnosed with chronic traumatic encephalopathy (CTE). His family emphasized the diagnosis provides important insight into his mental health prior to death.

Marshawn Kneeland's family said his posthumous CTE diagnosis provides "important context." Kneeland died by suicide at 24 years old in November 2025.