Concussion & CTE Foundation

CTE, or chronic traumatic encephalopathy, is a progressive brain condition caused by repeated head injuries, commonly found in contact sports athletes and military personnel. It leads to dementia-like symptoms and can only be definitively diagnosed post-mortem through autopsy. The condition was first identified in boxers in the 1920s and later linked to NFL players like Mike Webster.

Marshawn Kneeland, a Dallas Cowboys defensive end, had early stage CTE linked to repeated head trauma at the time of his death by suicide in November 2025 after a high-speed chase with police. His family released postmortem analysis findings through the Concussion & CTE Foundation.