Study: CTE Found in 215 of 235 Donated Brains From Former NFL Players

A new study has found that at least one in four former NFL players who died between 2016 and 2021 suffered from chronic traumatic encephalopathy. Researchers examined 878 deceased players from that period and received brain donations from 235 of them. Of those donations, 215 tested positive for the degenerative brain disease tied directly to repeated head trauma.

The findings come from Mass General Brigham, Boston University, and the Concussion and CTE Foundation. Lead author Daniel Daneshvar noted that NFL players face roughly four times the rate of death from neurodegenerative diseases compared to the general population. Dementia appeared frequently among the donors as well. Daneshvar stressed that repeated traumatic brain injuries drive these elevated risks and called for stronger prevention focused on cutting repetitive head impacts at every level of football.

An NFL spokesman responded with familiar language about making the game safer through new strategies and offering expanded resources for former players physical and mental health. The league urged players to seek treatment if concerned. Yet the study points out that most head impacts these men endured happened long before they reached the NFL, often in youth leagues, high school, and college.

This latest data adds to years of mounting evidence that the sport exacts a steep neurological toll. Many players enter professional ranks already carrying damage from years of collisions promoted as character-building at younger ages. The league has adjusted rules and added equipment in recent decades, but the core product remains built on violent contact that generates billions in revenue while the long-term costs fall on the athletes and their families.

Critics have long argued that official responses from the NFL amount to damage control rather than genuine reform. The organization spent years disputing links between football and brain disease before legal settlements and public pressure forced limited changes. Even now, the emphasis stays on managing symptoms after the fact instead of confronting how the game itself selects for players willing to absorb punishment.

The high percentage of CTE in the donated brains, over 91 percent of those examined, suggests selection effects among families who suspected problems. Still, the overall rate of one in four across all deceased players marks a stark public health signal. Families of affected players continue to deal with mood disorders, memory loss, and early dementia without adequate systemic support from the league that profited from their loved ones careers.

Football culture celebrates toughness and downplays risks, a pattern that begins in childhood programs and continues through the pros. The study underscores that true prevention requires reducing head impacts across all ages rather than relying on the NFL to police itself. With participation numbers already declining in some regions amid growing awareness, the findings may accelerate scrutiny of whether the sport can continue in its current form without broader accountability.