The answer is more nuanced than a single number. Most former NFL players appear to live roughly as long as men in the general population, but the quality of those years is significantly worse, and one group of players, offensive and defensive linemen, dies earlier than comparable men who never played. A large Harvard study of nearly 3,000 former players found that while overall lifespan may be similar to the general public, former NFL players develop age-related diseases about a decade sooner than other American men.
Why There’s No Simple Number
You’ve probably seen claims that the average NFL player dies at 53 or 55. Those figures circulate widely online but don’t hold up to rigorous analysis. The problem is something researchers call the “healthy worker effect”: NFL players were elite athletes to begin with, meaning they entered the league healthier and more physically fit than the average American male. Comparing them to the general population, which includes people with sedentary lifestyles, chronic illness, and substance use disorders, can make football look protective when it isn’t.
A 2023 study published in PNAS used stronger research methods to control for this bias. The researchers compared NFL players not to the general public but to otherwise similar men. Their conclusion: there is no evidence that playing professional football extends life. For non-linemen (quarterbacks, receivers, defensive backs, and similar positions), lifespan was roughly the same as comparable men. For linemen, it was shorter.
Linemen Face the Highest Risks
The biggest divide in NFL longevity isn’t between players and non-players. It’s between linemen and everyone else on the field. A CDC-funded study by the National Institute for Occupational Safety and Health found that offensive and defensive linemen had a 52% greater risk of dying from heart disease than the general population, and three times the risk compared to players at other positions. Among the largest linemen, those making up about 64% of the position group, the risk of heart disease death was six times higher than for normal-sized men.
The reason is largely physical. At the collegiate and professional levels, linemen routinely exceed 300 pounds. This weight is gained deliberately through aggressive eating and strength training, often beginning in college, without enough cardiovascular conditioning to offset the strain on the heart. Research published in the Journal of the American Heart Association found that former players who carried a BMI of 30 or higher during their playing years had close to double the risk of dying from cardiovascular disease compared to leaner former players. Former defensive linemen specifically had a 42% higher rate of cardiovascular death than the general population and more than five times the expected rate of a condition where the heart muscle weakens and enlarges.
Brain Disease Risk Is Three to Four Times Higher
Heart disease isn’t the only elevated threat. A NIOSH study tracking 3,439 NFL players who played at least five seasons between 1959 and 1988 found that deaths involving neurodegenerative diseases, including Alzheimer’s, ALS, and Parkinson’s, occurred three times more often than expected. For Alzheimer’s and ALS specifically, the rate was four times higher than in the general population. Among the 334 players who had died at the time of the study, 17 deaths involved neurodegenerative causes. In a similarly sized group of American men, researchers would have expected about 5.
Linemen again face elevated risk here. They experience more repeated head contact per game and per practice than players at most other positions, which research has linked to higher rates of concussion and chronic traumatic encephalopathy (CTE).
Living Longer Doesn’t Mean Living Well
Perhaps the most striking finding comes from the Harvard Football Players Health Study. Researchers surveyed 2,864 former NFL players between the ages of 25 and 59, asking whether they had been diagnosed with dementia, arthritis, hypertension, or diabetes. The pattern was consistent across every age group: former players’ health resembled that of American men roughly a decade older. For example, 66% of former players in their 30s reported no major chronic conditions, a rate nearly identical to men in their 40s in the general population. Across all conditions combined, the researchers estimated that these athletes’ “health spans” were reduced by nearly 10 years.
Linemen showed the shortest health spans of any position group, developing age-related diseases sooner than non-linemen across every decade of life. As the Harvard team summarized it: professional football players might live as long as other men, but those years are more likely to be filled with disability and chronic illness.
Suicide Rates Are Actually Lower
One finding cuts against the narrative that NFL careers are universally harmful. A CDC study of retired players who played five or more seasons found that suicide rates were significantly lower than expected, roughly half the rate of the general U.S. male population. The reasons aren’t fully clear, but financial stability, social connections from playing careers, and access to post-career support programs may all play a role. This doesn’t diminish the well-documented mental health struggles many former players face, but it does complicate the picture.
What Matters Most: Position and Body Size
If you’re trying to understand how the NFL affects lifespan, position matters far more than simply whether someone played. A former wide receiver or cornerback who maintained a healthy weight after retirement faces a very different health trajectory than a former offensive tackle who played at 320 pounds for a decade. The cardiovascular strain of maintaining extreme body mass, combined with repeated head trauma, creates a compounding risk that persists long after the last game.
For non-linemen, the research suggests life expectancy is roughly in line with the general population. For linemen, particularly the largest ones, the data points to a meaningfully shorter and less healthy life. The gap isn’t about football in the abstract. It’s about what the sport demands of certain bodies.