American football faces mounting evidence of a widespread neurological crisis among its former players. A comprehensive study released this week determined that former National Football League players who died between 2016 and 2021 showed alarmingly high rates of chronic traumatic encephalopathy, or CTE, a progressive brain disorder caused by repeated head trauma. The research examined 235 donated brains from the 878 former players who died during that five-year period, finding that 215 of those brains—representing more than 91% of donors—showed evidence of the disease, translating to at least one in four among all deceased players during this window.
CTE represents one of the most serious long-term health consequences of playing collision sports, yet it can only be definitively diagnosed through brain examination after death. The condition causes cognitive decline, behavioural changes, and mood disturbances that typically emerge years or decades after the traumatic brain injuries occur. Among the brain donors examined, dementia proved remarkably common, suggesting that many former players spent their final years grappling with severe neurological deterioration. This pattern underscores a troubling reality: the visible injuries from football—torn ligaments, broken bones, acute concussions—may prove less consequential than the invisible, cumulative damage that accumulates silently in the brain.
The research, conducted by scientists from Mass General Brigham, Boston University, and the Concussion & CTE Foundation, carries profound implications for how the sport is understood and managed at every competitive level. Daniel Daneshvar, who chairs the department of physical medicine and rehabilitation at Mass General Brigham and teaches at Harvard Medical School, emphasised that former NFL players experience approximately four times higher mortality rates from neurodegenerative diseases compared to the general population. This striking differential cannot be dismissed as coincidental or attributable solely to individual susceptibility; it points directly to the cumulative neurological burden imposed by professional football careers.
What makes this research particularly significant is its revelation about when most brain damage actually occurs. Contrary to assumptions that professional careers represent the primary threat, Daneshvar highlighted that the overwhelming majority of head impacts experienced by NFL players happened long before they turned professional. The repeated hits during high school years, college football careers, and youth league participation accumulate silently, building toward the neurological crisis that manifests decades later. This timeline has profound policy implications, suggesting that preventing brain injury in American football requires action far beyond the NFL itself—it demands systemic change throughout the entire pyramid of play.
The NFL has implemented certain protective measures in recent years, though critics argue these remain insufficient. The 2011 Collective Bargaining Agreement between the league and players' union restricted the number of full-contact practices during the season, representing a significant shift from the sport's traditional heavy-hitting culture. More recently, the Ivy League prohibited full-contact tackling during practice sessions, marking a notable shift even among elite amateur programmes. However, these changes address only a fraction of the problem, particularly given that nearly 70% of head impacts occur during practices rather than games. Without fundamentally restructuring how the sport is taught and trained at lower levels, even aggressive professional reforms cannot fully address the accumulated damage.
The league's official response emphasises its commitment to player safety and mental health resources, yet the scale of the CTE problem suggests that current interventions may prove inadequate. The NFL pointed to its strategies for reducing concussions and head impacts, along with its expansion of support services for former players, as evidence of serious engagement with the issue. However, such measures risk appearing defensive when juxtaposed against findings showing that nine out of ten brain donors from deceased players had evidence of CTE. For former players, many now experiencing cognitive decline or other neurological symptoms, available resources must address not only the known problem but also the psychological burden of recognition that their condition stems from choices made when they were teenagers or college students.
Daneshvar's recommendations point toward a comprehensive restructuring of how football is played at all levels. Reducing contact in practice to less than once weekly, as now occurs in some NFL settings, could be implemented across high school and college programmes without altering game rules or eliminating the sport's fundamental character. The potential impact of such changes would be enormous: if the cumulative head impact burden experienced by current players could be substantially reduced through practice modifications alone, many future cases of CTE and associated neurodegenerative diseases might be prevented. This represents a policy opportunity that requires no technological innovation or wholesale abandonment of the sport, only a recalibration of training philosophy.
The 2016 Supreme Court decision clearing the way for the NFL's settlement of concussion-related lawsuits with thousands of retired players represented a legal acknowledgment that the league bore responsibility for neurological harm inflicted upon its workforce. That settlement, however, addressed only those players capable of proving their damage resulted from NFL-level play. The broader crisis revealed by this latest research implicates not only the professional league but also colleges, high schools, and youth organisations that feed players into the pipeline. For Malaysian and Southeast Asian readers, the controversy reflects broader questions about sports governance, duty of care toward athletes, and how organisations should respond when scientific evidence reveals systemic harm.
The research essentially establishes that football, as currently practised across American society, imposes significant neurological costs distributed across all participants regardless of professional status. Former players exhibiting cognitive symptoms are now urged to seek evaluation from specialists in neurodegenerative disease, creating a pathway for diagnosis and potential treatment of symptoms, even though CTE itself remains incurable. This medical reality creates a moral tension: the sport can identify the problem and offer symptomatic support, but it cannot reverse the fundamental brain damage that develops over years of repetitive impacts. The study thus forces American football culture to confront whether the sport, as traditionally played, can be reconciled with acceptable standards of participant safety.
Looking forward, the burden of action lies not primarily with the professional league but with the broader sporting ecosystem. High school football coaches, college programmes, and youth sports organisations must grapple with evidence that the training methods they employ may impose lasting neurological consequences on young people whose brains are still developing. The research provides scientific justification for practice restrictions that some progressive programmes have already adopted but that remain controversial in football strongholds where heavy contact during training is viewed as essential to competitive success. This tension between tradition and safety awareness will likely define debates about American football's future shape and character.
