Dossier
Dr. Chris Nowinski
Coverage of Dr. Chris Nowinski in the Nexus archive.
- Former Dallas Cowboys defensive end Kneeland had early stage CTE at time of death
Marshawn Kneeland, a Dallas Cowboys defensive end who died by suicide in 2025, was diagnosed with early-stage chronic traumatic encephalopathy (CTE) after his death. The Boston University CTE Center confirmed the diagnosis, linking it to repeated head trauma. Kneeland's family emphasized the importance of raising awareness about CTE in athletes.