CTE

Playing football has long been linked to the brain disease known as CTE, but how prevalent it is is still unknown. A new study of former NFL players who died recently found that at least 25% had CTE.

Former Dallas Cowboys defensive end Marshawn Kneeland had a brain abnormality linked to repeated head trauma when he died by suicide after a high-speed chase with police in November 2025. The findings of a postmortem analysis of Kneeland's brain tissue were released Tuesday by his family through the Concussion and CTE Foundation.

The relationship has been fraught with disputes about which research should be funded. Four House members have asked NFL Commissioner Roger Goodell whether the league plans to honor its commitment.

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