A Boston University study uncovered a staggering reality: three out of every four former NFL players who died between 2008 and 2023 had chronic traumatic encephalopathy, a degenerative brain disease that destroys lives and devastates families long after the final whistle blows.
Selection Bias Corrected — Numbers Still Alarming
Researchers examined 387 deceased former NFL players and found CTE in 362 of them, a shocking 94 percent rate. Brain donors typically show symptoms before death, creating selection bias that skews results higher. Scientists accounted for this by determining that former players with cognitive symptoms were five times more likely to donate their brains to research. After statistical adjustment, the prevalence dropped to 74.5 percent, still 75 times higher than the general population rate of less than one percent.
Lead author Julia Gallini emphasized the urgency of these findings. The study, published in JAMA Network Open, demonstrates how CTE remains exceptionally rare among community brain bank donors but devastates former professional football players at alarming rates. Researchers stressed the need for increased family support, better diagnostic tools for living patients, and effective treatments for CTE-related symptoms.
Players Knew The Risks — League Responds
Former quarterback Matt Hasselbeck, serving as an ambassador for the study, acknowledged the harsh reality facing retired players. He called for using this data to protect future generations, stating the current numbers cannot be accepted for those who follow. Patriots head coach Mike Vrabel, a former linebacker, took a different stance, saying players understood the dangers when they signed up. He mentioned potential injuries ranging from unconsciousness on the field to multiple surgeries as known occupational hazards.
The NFL released a statement committing to robust resources for physical and mental wellbeing throughout the league community. The organization encouraged former players to utilize available programs for identifying and treating health concerns. The NFL Players Association called such research critical for understanding football’s long-term health impacts, pledging continued support for scientific studies and expanded access to care.
What This Means
CTE can only be definitively diagnosed after death, leaving thousands of living former and active players uncertain about their brain health. The disease results from repeated head trauma and has been discovered in football players, other athletes, military members, and first responders. Researchers emphasized this study examined only deceased players and cannot predict CTE prevalence among those still living. The findings raise serious questions about player safety, family planning, and the true cost of America’s most popular sport.
Sources
Cbsnews: CTE study finds nearly 75% of ex-NFL players who died from 2008 to 2023 had brain disease