Cowboys’ Marshawn Kneeland diagnosed with stage 1 CTE when he died by suicide

The family of Dallas Cowboys defensive lineman Marshawn Kneeland released post-mortem brain tissue analysis results on Tuesday. The findings confirm that the 24-year-old player was diagnosed with stage 1 CTE. These details emerge after Kneeland died by suicide in November 2025. Researchers conducted the brain analysis to determine the cause of death and identify neurological conditions, providing heartbreaking confirmation regarding the athlete's health status prior to his passing last year in a tragic incident.