Doctors found a brain disease called CTE in Marshawn Kneeland. He played for the Dallas Cowboys. He died in November 2025.

醫生在 Marshawn Kneeland 身上發現了一種稱為 CTE 的腦部疾病。他曾效力於達拉斯牛仔隊，於 2025 年 11 月去世。

Doctors looked at his brain after he died. Many young athletes have this disease. The NFL has new helmets, but some doctors say they do not stop CTE. Small hits to the head many times cause the problem.

醫生在他去世後檢查了他的大腦。許多年輕運動員都患有這種疾病。NFL 雖然推出了新頭盔，但有些醫生表示這些頭盔無法阻止 CTE。問題是由於頭部多次受到輕微撞擊所引起的。

Mr. Kneeland had a hard time in 2020. He went to the hospital and had problems with a gun. In November 2025, he drove his car very fast. Then he killed himself with a gun.

Kneeland 先生在 2020 年過得很艱難。他曾住院，並發生過與槍支相關的問題。在 2025 年 11 月，他將車開得非常快，隨後用槍自殺。

Doctors say CTE is a brain disease. But they say it is not the only reason why people kill themselves. Many things can make a person sad or sick.

醫生表示 CTE 是一種腦部疾病，但他們也指出，這並非導致自殺的唯一原因。許多因素都可能使人感到憂鬱或患病。

It is hard to find CTE while a person is alive. New rules in sports do not stop this brain risk.

在一個人還活著的時候，很難發現 CTE。運動界的新規則無法阻止這種腦部風險。

Researchers at the Boston University CTE Center have confirmed that Marshawn Kneeland, a former defensive end for the Dallas Cowboys, had Stage 1 chronic traumatic encephalopathy (CTE) before he died in November 2025.

波士頓大學 CTE 中心的研究人員確認，前達拉斯牛仔隊防守端鋒 Marshawn Kneeland 在 2025 年 11 月去世前，患有第一期慢性創傷性腦病變 (CTE)。

The diagnosis was made after analyzing brain tissue through the Concussion & CTE Foundation. Dr. Ann McKee, the director of the center, emphasized that this progressive brain disease is found in about 50% of athletes who died before the age of 30. Although the NFL has introduced better helmet technology and updated concussion rules, Dr. Chris Nowinski, CEO of the foundation, asserted that these changes are not enough to prevent CTE. He explained that the disease is caused by the total number of small head impacts over time, rather than a few major concussions; consequently, current players may still face the same risks as those in the past.

這次診斷是透過腦震盪與 CTE 基金會分析腦組織而得出的。中心主任 Ann McKee 醫師強調，這種進展性腦病在 30 歲前去世的運動員當中，大約有 50% 會出現。雖然 NFL 引入了更好的頭盔技術並更新了腦震盪規則，但基金會執行長 Chris Nowinski 醫師堅稱，這些改變不足以防止 CTE。他解釋說，這種疾病是由長時間累積的大量細微頭部撞擊引起，而非幾次嚴重的腦震盪；因此，目前的球員可能仍面臨與過去相同的風險。

Regarding the events leading to his death, police records show that on November 5, 2025, Mr. Kneeland was involved in a high-speed car chase in Frisco, Texas, reaching speeds over 145 mph. After a car accident and a short chase on foot, Mr. Kneeland was found dead from a self-inflicted gunshot wound. Records indicate he had struggled with mental health since 2020, including a time when he gave up a firearm and another instance where he was hospitalized for self-harm. Despite this history, the Boston University CTE Center maintains that suicide is caused by many different factors, and therefore, a CTE diagnosis should not be seen as the only cause of his death.

關於導致其死亡的經過，警方紀錄顯示在 2025 年 11 月 5 日，Kneeland 先生在德州 Frisco 參與了一場高速追逐，車速超過 145 英里。在發生車禍及短暫的徒步追逐後，Kneeland 先生被發現死於自殺開槍。紀錄顯示他自 2020 年起便飽受心理健康問題困擾，包括一次交出槍支，以及另一次因自殘而住院。儘管有這些病史，波士頓大學 CTE 中心依然堅持自殺是由許多不同因素引起，因此不應將 CTE 診斷視為其死亡的唯一原因。

This case highlights the difficulty of diagnosing CTE while a person is still alive and suggests that current sports safety rules may not be enough to reduce long-term brain risks.

這個案例凸顯了在人還在世時診斷 CTE 的困難，並暗示目前的運動安全規則可能不足以降低長期腦部風險。

Researchers at the Boston University CTE Center have confirmed that Marshawn Kneeland, a former Dallas Cowboys defensive end, suffered from Stage 1 chronic traumatic encephalopathy (CTE) prior to his death in November 2025.

波士頓大學 CTE 中心的研究人員已確認，前達拉斯牛仔隊防守端 Marshawn Kneeland 在 2025 年 11 月去世前，患有第一期慢性創傷性腦病變 (CTE)。

The diagnosis was established via post-mortem brain tissue analysis conducted by the Concussion & CTE Foundation. Dr. Ann McKee, director of the Boston University CTE Center, noted that the prevalence of this progressive neurodegenerative disease is observed in approximately 50% of studied athletes who deceased before age 30. While the NFL has implemented modernized helmet technology and revised concussion protocols, Dr. Chris Nowinski, CEO of the Concussion & CTE Foundation, asserts that such measures are insufficient for the prevention of CTE. He posits that the pathology is precipitated by cumulative sub-concussive head impacts rather than isolated concussive events, suggesting that current generations of athletes remain at comparable risk to their predecessors.

此診斷是由腦震盪及 CTE 基金會進行的死後腦組織分析得出。波士頓大學 CTE 中心主任 Ann McKee 博士指出，在 30 歲前去世且接受研究的運動員中，約有 50% 患有這種進展性神經退化疾病。雖然 NFL 已經採用了現代化頭盔技術並修訂了腦震盪處理方案，但腦震盪及 CTE 基金會執行長 Chris Nowinski 博士認為，這些措施對於預防 CTE 來說是不夠的。他認為病理原因是由累積的亞腦震盪頭部撞擊引起，而非單一的腦震盪事件，這意味著現今一代的運動員與前輩面臨著相當的風險。

Regarding the circumstances of Mr. Kneeland's death, law enforcement records indicate a sequence of events commencing on November 5, 2025, involving a high-speed vehicle pursuit in Frisco, Texas, characterized by speeds exceeding 145 mph. Following a vehicular collision and a subsequent foot pursuit, Mr. Kneeland was located deceased from a self-inflicted gunshot wound. Historical data suggests a pattern of psychological instability dating back to 2020, including an incident involving the surrender of a firearm and a separate hospitalization following an expressed desire for self-harm. Despite these antecedents, the Boston University CTE Center maintains that suicide is a multifactorial phenomenon and that a posthumous CTE diagnosis should not be interpreted as the primary causal agent of the act.

關於 Kneeland 先生去世的情況，執法部門記錄顯示，事件始於 2025 年 11 月 5 日，當時在德州 Frisco 發生了一場高速追車，車速超過 145 英里/小時。在車輛碰撞及隨後的徒步追捕後，Kneeland 先生被發現死於自殺槍擊。歷史數據顯示，其心理不穩定模式可追溯至 2020 年，包括一次上繳槍支的事件，以及另一次因表達自殘意願而住院。儘管有這些前科，波士頓大學 CTE 中心仍維持自殺是一個多因素現象，死後診斷出 CTE 不應被視為該行為的主要原因。

The case underscores the ongoing challenge of diagnosing CTE during a patient's lifetime and the perceived inadequacy of current athletic protocols in mitigating long-term neurological risk.

此個案凸顯了在病人生存期間診斷 CTE 仍是一項挑戰，且現有的運動員方案在降低長期神經風險方面被認為不足。