
Quadruple Risk: Study Links NFL Careers to Higher Neurodegenerative Deaths
A Mass General Brigham–Boston University–CTE Foundation study of nearly 20,000 NFL players finds death from neurodegenerative disease is about four times higher than in the general population, with dementia and Parkinson’s deaths 3–4x more common; longer careers (five-plus seasons) nearly double the risk versus shorter careers. CTE is considered the primary explanation, though players generally live longer overall due to other protective factors.













