Three in four deceased former NFL players showed chronic brain disease tied to repeated hits, and the number is not guesswork—it is a new, selection-bias-adjusted estimate from a large, peer-reviewed study.
Story Snapshot
- A study estimated 74.5% of former NFL players who died from 2008–2023 had CTE.
- Researchers analyzed 2,362 deaths, blending brain bank data with national death records.
- Brain donors had very high CTE rates; the model adjusted for who donates and why.
- The finding lands in JAMA Network Open and amplifies an urgent player-safety debate.
The finding: CTE in the majority of deceased NFL veterans
Researchers reported that about 74.5% of former National Football League players who died between 2008 and 2023 had chronic traumatic encephalopathy, the brain disease linked to repeated head impacts. The team combined a large brain bank with a national registry of player deaths to build a fuller picture of risk. The peer-reviewed paper appeared in JAMA Network Open, which means the methods and math faced outside scrutiny before publication. One number cuts through the noise: three in four.
The analysis included 2,362 deceased players. It pulled 396 brain donors from the Boston University-led bank and matched them with 1,966 non-donors identified through official death records. Among donors, the share with diagnosed CTE was strikingly high. But families of players with symptoms are more likely to donate, so the team corrected for that bias. After adjustment, they still landed near 75 percent. That is not a lab curiosity; it is a population-level estimate of disease in this defined group.
Why this estimate is different from past headlines
Past reporting focused on donor-only studies with eye-popping CTE rates above 90 percent in examined brains. Those studies told us what pathologists saw under the microscope. They did not tell us how common CTE was among all players who died. This study bridges that gap. It quantifies how factors like symptoms, position, and career length influence who donates, then adjusts the totals. The bottom line still runs high: almost three in four deceased players likely had the disease.
Common sense says families seek answers when they see memory loss, mood swings, or loss of function. That pattern boosts donor rates among symptomatic players and inflates raw donor-only percentages. The new work accounts for that reality without dismissing it. It respects the pathology and the math. For readers who care about fair play and clear rules, this is the right approach: do the hard accounting, then face what the numbers show.
What it means for the league, players, and families
The estimate raises the floor for how we think about risk. If repeated sub-concussive hits drive long-term harm, then equipment, practice rules, and return-to-play protocols must follow the science. The league and the union have already made changes over the last decade, but the duty of care does not end with checkbox reforms. A 75 percent estimate among the deceased is a moral nudge to keep reducing head impacts across drills, games, and seasons.
74.5%
That's the estimated share of NFL players who died between 2008 and 2023 who had CTE, according to a new study in JAMA Network Open that corrects for brain-donation selection bias. An estimated 27.2% of all those players had dementia while alive https://t.co/6iUZPanY7D
— Bryan Walsh (@bryanrwalsh) October 29, 2026
Families carry the cost when a player’s brain fails in middle age. Communities do too. This is not only about famous names; it is about rank-and-file veterans who gave their best years to the game and left the field long before their bodies and minds did. A society that honors service should honor theirs with straight talk, better prevention, and strong support when damage shows up. That aligns with basic fairness and responsibility, not politics.
How to read the caveats without losing the plot
Only a postmortem exam can confirm chronic traumatic encephalopathy. The estimate applies to players who died in the fifteen-year window and uses modeling to include non-donors. That is standard in medical research when full exams are not possible. The authors placed their single clearest figure where scrutiny is highest: 74.5 percent after adjusting for who tends to donate and why. That careful method strengthens, not weakens, the core claim.
Sources:
nbcnews.com, people.com, scientificamerican.com, bostonglobe.com, courthousenews.com, footballplayershealth.harvard.edu
