Former Dallas Cowboys defensive end Kneeland had early stage CTE at time of death
Summary
Former Dallas Cowboys player Marshawn Kneeland, who died by suicide in 2025 at age 24, was found to have early stage chronic traumatic encephalopathy (CTE), a brain disease linked to repeated head injuries. His family shared this information to raise awareness about the struggles athletes in contact sports may face.Key Facts
- Marshawn Kneeland died by suicide in November 2025 after a police chase in Texas.
- Boston University’s CTE Center found Kneeland had stage one CTE, a brain disease caused by repeated head trauma.
- CTE affects mood and behavior and can only be diagnosed after death.
- Kneeland played football from age 7, including for Western Michigan University and the Dallas Cowboys, who drafted him in 2024.
- The family released the diagnosis to help others understand risks faced by athletes in contact sports like football.
- CTE is linked to neurological problems and has been found in players of football, hockey, and soccer.
- Current concussion protocols and safety gear do not prevent CTE because it is caused by repeated hits to the head, not only diagnosed concussions.
- Studies show NFL players have a higher risk of neurological diseases like ALS, another condition linked to brain trauma.
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