what football players have been diagnosed with cte: names

Several former professional football players have had chronic traumatic encephalopathy (CTE) confirmed after death, including Mike Webster, Junior Seau, Dave Duerson, and Aaron Hernandez. CTE cannot currently be confirmed in a living person; researchers identify it by examining brain tissue after death.

This article names notable players whose postmortem examinations found CTE, explains what those findings mean, and clears up why lists differ. It also separates confirmed brain findings from suspected cases, so you can read reports about football and brain health with more care.

what football players have been diagnosed with cte

Notable former NFL players whose brains were reported to have CTE after death include Mike Webster, Terry Long, Andre Waters, Justin Strzelczyk, Tom McHale, Shane Dronett, Chris Henry, Dave Duerson, Junior Seau, Ray Easterling, Jovan Belcher, Ken Stabler, Frank Gifford, Fred McNeill, Bubba Smith, and Aaron Hernandez. This is a selection of publicly reported cases, not a complete list of every football player whose brain showed CTE.

The word diagnosed needs an important clarification. At present, doctors cannot confirm CTE in a living person. A definite diagnosis requires an examination of brain tissue after death by specialists using established pathological criteria. Players named in this article were reported to have had CTE identified in their brains after death.

These findings show that CTE has been found in some former football players. They do not prove that every player develops the disease, or that CTE alone explains a person’s behavior, symptoms, or death. Researchers continue to study how exposure to repeated head impacts relates to CTE and other health outcomes.

Notable former players with reported postmortem CTE

The table below summarizes well-known examples. It focuses on players with publicly reported postmortem findings, rather than people whose families or commentators have only suspected CTE. The list is not ranked, and it does not imply that all players had the same symptoms or disease severity.

Public reporting can vary in how much detail it gives. Some reports name the institution that examined the brain; others share only the family’s announcement or the general finding. Unless a report specifies a stage and the method used, it is safer not to assign one.

How CTE is confirmed

CTE is a brain disease associated with repeated head impacts. Those impacts can include concussions, but they can also include repeated hits that do not cause a diagnosed concussion. A person may not lose consciousness or feel immediately ill after every impact.

In a postmortem examination, specialists look for an abnormal pattern of a protein called tau in the brain. Tau is a protein present in the brain normally; in CTE, it accumulates in a specific pattern around small blood vessels and in particular brain regions. Seeing that pattern under a microscope is what allows researchers to confirm the disease.

Symptoms during life cannot establish CTE on their own. Memory problems, depression, irritability, trouble concentrating, and changes in behavior can have many causes. They may occur with other neurological or mental health conditions, and they do not prove that someone has CTE.

Researchers and clinicians can assess a living person’s symptoms, history, and general brain health. That assessment may identify problems that need care, but it cannot currently provide a definitive CTE diagnosis. Brain scans and other tests are being studied; they are not a substitute for the postmortem tissue examination used to confirm CTE today.

Why lists of football players with CTE differ

There is no single public roster that includes every confirmed case. Many families choose not to share examination results, while other cases appear in scientific reports or news coverage. Some lists combine confirmed postmortem findings with suspected cases, which can make a list look longer but less reliable.

Research projects also differ in whom they examine. Some analyze donated brains from former players or other people with a history of repeated head impacts. A donated-brain collection is valuable for studying disease, but it is not a random sample of all players. Families concerned about symptoms may be more likely to donate, so the cases studied cannot tell us what percentage of all football players develop CTE.

Names can also be confused with players whose families pursued legal claims, raised concerns about brain health, or discussed symptoms publicly. Those details may be important, but they are not the same as a confirmed postmortem finding. Check whether a report says CTE was found in brain tissue, rather than assuming that a lawsuit, diagnosis of another condition, or reported symptom confirms it.

What the confirmed cases do—and do not—show

Confirmed cases establish that CTE has occurred in football players. They have helped researchers ask how repetitive head impacts, years of play, position, and other factors might relate to brain disease. But a list of cases cannot answer how common CTE is among all current or former players.

It also cannot show that CTE caused every difficulty a player experienced. A person’s health can be influenced by many factors, including other medical conditions, injuries, sleep, substance use, and life circumstances. A postmortem finding may provide evidence about brain disease, but it cannot by itself explain every action or cause of death.

One common misconception is that only diagnosed concussions matter. Repeated impacts that do not produce obvious concussion symptoms may also contribute to cumulative exposure. That does not mean every routine contact causes CTE; it means concussion counts alone do not capture every head impact a player experiences.

Another point often missed: most research figures come from donated brains, not from testing every person who played football. A percentage calculated from a brain bank should not be read as the percentage of all football players with CTE. The group that donated brains may differ from the full population in important ways.

How football exposure can be reduced

No helmet can prevent every brain injury or guarantee protection from CTE. Helmets are designed to reduce certain risks, but repeated contact still matters. Risk reduction is strongest when equipment, coaching, rules, and medical decisions work together.

1. Limit avoidable contact. Coaches can reduce unnecessary full-contact practices and emphasize safe technique. Fewer repetitive impacts can lower exposure, even when players do not suffer a diagnosed concussion.
2. Report symptoms promptly. Headache, dizziness, confusion, nausea, or memory problems after a hit should be reported to a coach, athletic trainer, parent, or medical professional. Hiding symptoms can delay care and increase the risk of another injury.
3. Follow return-to-play guidance. A player with a suspected concussion should stop playing and receive appropriate medical assessment. Returning before symptoms have resolved and a qualified professional has cleared the player can put recovery at risk.
4. Review youth football practices. Parents can ask how often full contact occurs, how coaches teach tackling, and what the team does after a suspected head injury. These practical questions matter more than relying on equipment claims alone.

These steps cannot promise that a player will avoid CTE. They are sensible ways to reduce preventable head impacts and respond quickly when a head injury may have occurred.

When to seek medical help for symptoms

If a current or former player has memory issues, mood changes, headaches, sleep problems, or difficulty managing daily tasks, arrange an evaluation with a qualified health professional. Do not wait for a CTE test: no validated test currently confirms CTE in a living person, but many symptoms can be assessed and treated.

After a recent head hit, seek urgent care for worsening headache, repeated vomiting, seizure, increasing confusion, unusual drowsiness, weakness, or loss of consciousness. These can signal a serious injury. If someone expresses thoughts of self-harm or poses an immediate danger to themselves or others, contact emergency services or a crisis service in their area.

Bring a clear history to an appointment: years and levels of play, known concussions, other head impacts, symptom timing, medications, and changes noticed by family members. That information can help clinicians consider possible causes and recommend appropriate care without assuming that CTE is the answer.

Several former NFL players, including Mike Webster, Junior Seau, and Aaron Hernandez, had CTE confirmed through postmortem brain examinations. These cases are important, but they do not tell us how common CTE is among all football players or explain every symptom a person experienced.

If you are concerned about a player’s memory, mood, or other symptoms, arrange a medical evaluation rather than trying to diagnose CTE from a list. For a current head injury, stop play and seek appropriate care; repeated impacts without a diagnosed concussion also deserve attention.