NFL player Marshawn Kneeland, who played for the Dallas Cowboys, was diagnosed with stage 1 chronic traumatic encephalopathy (CTE) after his death by suicide in November 2025. The diagnosis was made by researchers at Boston University’s CTE Center through a postmortem brain tissue analysis.
Kneeland, who was only 24 at the time of his death, had played 18 games for the Cowboys after being drafted in the second round of the 2024 NFL Draft. His family stated that the diagnosis provided "important context" regarding his struggles and aimed to raise awareness about the challenges athletes in high-contact sports face.
Understanding Chronic Traumatic Encephalopathy (CTE)
CTE is a progressive brain disease caused by repeated head injuries. It can only be diagnosed posthumously, and symptoms can range from headaches and concentration issues to severe cognitive decline and suicidal thoughts. According to the CTE Society, athletes in sports like American football, rugby, and combat sports are at a significantly higher risk of developing this condition.
Statistics on CTE in Athletes
Research from the Boston University CTE Center indicates alarming prevalence rates among former NFL players:
- CTE diagnosed in 345 of 376 former NFL players studied
- In stage 1, symptoms may include headaches, depression, and short-term memory problems
- More than 21,000 ex-players could be eligible for compensation from a $1 billion settlement with the NFL
Dr. Chris Nowinski, co-founder and CEO of the Concussion & CTE Foundation, emphasized that even modern concussion protocols have not sufficiently reduced the risk of CTE in athletes.
The Impact of Kneeland's Case
Kneeland's tragic death, resulting from a self-inflicted gunshot wound after a police chase, underscores the complexities surrounding mental health and brain injuries in sports. His family hopes that sharing his story will foster greater understanding and compassion for athletes who may be suffering in silence.
Dr. Ann McKee, director of the CTE Center, noted that nearly half of the athletes studied who died before 30 had developed CTE, highlighting the urgent need for continued research and improved safety measures in contact sports.
🤖 This article was rewritten by Feed and Figures' editorial AI from a report originally published by BBC Sport. Facts and quotes are preserved from the original; the rewrite focuses on clarity and structure. For the unedited original, see the source link below.
