Marshawn Kneeland CTE Diagnosis Revealed

Tragic End at 24

Marshawn Kneeland, a defensive end who spent his final two professional seasons with the Dallas Cowboys, died by suicide in November 2025 at the age of 24. He had been a standout player for the Cowboys after being drafted in his second year out of college. Kneeland’s life was cut short just as he was beginning to make his mark in the NFL. He had started playing tackle football when he was only seven years old, a detail his family later highlighted in a press release.

Stage 1 CTE Diagnosis

Researchers at Boston University’s CTE Center announced a posthumous diagnosis of stage 1 chronic traumatic encephalopathy for Kneeland. The finding came through a press release from the Concussion and CTE Foundation, which noted that the disease can only be confirmed after death. The report underscores the cumulative impact of years spent in high‑contact sports. Kneeland’s case adds to a growing body of evidence linking early and prolonged exposure to football with brain disease.

Expert Insight from Dr. Ann McKee

Dr. Ann McKee, director of the Boston University CTE Center and chief of neuropathology for the VA Boston Healthcare System, commented that the diagnosis was “unfortunately…not surprising.” She pointed out that nearly half of the athletes studied who died before age 30 were found to have CTE. The statement highlights the severe risks faced by young players in contact sports. Dr. McKee’s remarks reinforce the need for better protective measures and awareness.

Family’s Statement and Legacy

Kneeland’s family released a statement saying the diagnosis “does not change the tragedy of his passing, but it provides important context about some of the struggles he may have been facing.” They emphasized that sharing the information aims to help other athletes and their loved ones understand hidden battles. The family urged compassion, remembering Marshawn for the person he was rather than defining him by his final moments. Their words also serve as a call for greater mental‑health support across sports.

CTE and Mental Health Resources

CTE manifests after death, but potential symptoms include memory loss, impulsive behavior, and depression—issues that may have affected Kneeland in life. Because the disease cannot be diagnosed while a person is alive, early detection remains a challenge for medical professionals. If you or someone you know needs mental‑health support, the 988 Suicide & Crisis Lifeline offers free, confidential help 24/7. Reach out via call, text, or chat at 988 or visit 988lifeline.org.