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

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。

Marshawn Kneeland died in November 2025. He was 24 years old. Doctors at Boston University studied his brain. They found Stage 1 CTE. This disease happens when the head hits hard many times. It can make people feel sad or act angry.

Marshawn Kneeland 於 2025 年 11 月去世，當時他 24 歲。波士頓大學的醫生研究了他的大腦，發現他患有第一期 CTE。這種疾病是因為頭部多次受到強力撞擊而引起，會導致患者感到憂鬱或情緒暴躁。

Many young athletes have this disease. One study says about 41% of athletes under 30 have CTE. Black athletes have this disease more often. Many of these athletes die by suicide, but doctors are still studying why.

許多年輕運動員都患有這種疾病。一項研究指出，30 歲以下的運動員中，約 41% 患有 CTE。黑人運動員患病率更高。許多這類運動員死於自殺，但醫生仍在研究原因。

Some experts say football is still dangerous. New helmets do not stop the disease. The head hits the ground too many times. Experts say the sport must change to keep players safe.

一些專家表示美式足球仍然很危險。新款頭盔無法阻止這種疾病，因為頭部撞擊地面的次數太多。專家認為這項運動必須做出改變，才能保障球員的安全。

Marshawn Kneeland had a brain disease. This shows that football is still risky for the brain.

Marshawn Kneeland 患上了腦部疾病，這顯示美式足球對大腦而言依然具有風險。

Medical examiners have confirmed that Marshawn Kneeland, a former defensive end for the Dallas Cowboys, had Stage 1 chronic traumatic encephalopathy (CTE) when he died.

法醫確認前達拉斯牛仔隊防守端鋒 Marshawn Kneeland 在去世時患有第一期慢性創傷性腦病 (CTE)。

The diagnosis was made by the Boston University CTE Center after analyzing his brain tissue. Kneeland, who died by suicide in November 2025 at the age of 24, had the earliest of four stages of this brain disease. CTE is caused by repeated hits to the head, which destroy brain cells and can lead to symptoms such as depression, impulsive behavior, and memory problems. His family stated that these results help explain the psychological struggles Kneeland faced during his life.

波士頓大學 CTE 中心在分析其腦組織後做出了這項診斷。Kneeland 於 2025 年 11 月自殺身亡，當時年僅 24 歲，患有這種腦部疾病最早期的一期。CTE 是由頭部反覆受擊引起，會破壞腦細胞，並導致憂鬱、衝動行為和記憶力問題等症狀。他的家人表示，這些結果有助於解釋 Kneeland 生前所面臨的心理掙扎。

Dr. Ann McKee from the Boston University CTE Center emphasized that this case follows a known pattern. According to a 2023 study, 41.4% of athletes who died before age 30 showed signs of CTE. Furthermore, the data suggests that Black athletes are more affected, with 59% of the Black athletes in the study diagnosed with the condition. Although suicide was the most common cause of death in the group, the center clarified that a CTE diagnosis is not officially proven to be a direct cause of suicide.

波士頓大學 CTE 中心的 Ann McKee 醫生強調，此個案符合已知模式。根據 2023 年的一項研究，30 歲前去世的運動員中，有 41.4% 顯示有 CTE 跡象。此外，數據顯示黑人運動員受影響更深，研究中 59% 的黑人運動員被診斷患有此病。雖然自殺是該組人最常見的死因，但中心澄清，CTE 診斷尚未被正式證明是自殺的直接原因。

Dr. Chris Nowinski, CEO of the Concussion & CTE Foundation, argued that this case shows that current safety rules are not enough. He pointed out that even with modern helmets and concussion protocols, athletes are still at risk. Because CTE is caused by many small hits to the head over time rather than a single big injury, Nowinski asserted that the sport must reduce the overall number and intensity of head impacts to protect players.

腦震盪與 CTE 基金會 (Concussion & CTE Foundation) 執行長 Chris Nowinski 博士認為，此個案顯示目前的安全規則並不充足。他指出，即使有現代化頭盔和腦震盪處理方案，運動員仍處於風險之中。由於 CTE 是由長時間內多次輕微頭部撞擊引起，而非單次嚴重受傷，Nowinski 主張體育界必須減少頭部撞擊的總量與強度，以保護球員。

The diagnosis of Stage 1 CTE in Marshawn Kneeland highlights that brain risks in contact sports remain a serious problem despite modern safety measures.

Marshawn Kneeland 被診斷患有第一期 CTE，凸顯出儘管有現代安全措施，接觸性運動的腦部風險依然是一個嚴重問題。

Medical examiners have confirmed that Marshawn Kneeland, a former defensive end for the Dallas Cowboys, suffered from Stage 1 chronic traumatic encephalopathy (CTE) at the time of his death.

法醫已確認，前達拉斯牛仔隊防守端鋒 Marshawn Kneeland 在去世時患有第一期慢性創傷性腦病變 (CTE)。

The diagnosis was rendered by the Boston University CTE Center following a postmortem analysis of brain tissue. Kneeland, who deceased by suicide in November 2025 at age 24, exhibited the earliest of four clinical stages of the degenerative disease. This pathology is characterized by the destruction of neural cells and is associated with repetitive head trauma, manifesting in symptoms such as depression, impulsive behavior, and cognitive deficits. The family of the deceased stated that these findings provide necessary context regarding the psychological challenges Kneeland encountered.

波士頓大學 CTE 中心在對腦組織進行死後分析後做出了此診斷。Kneeland 於 2025 年 11 月自殺去世，當時年僅 24 歲，呈現出這種退化性疾病四個臨床階段中最早期的症狀。這種病理特徵是神經細胞的破壞，並與重複性頭部創傷相關，表現為憂鬱、衝動行為和認知缺陷等症狀。死者家屬表示，這些發現為 Kneeland 曾面臨的心理挑戰提供了必要的背景資訊。

From a broader epidemiological perspective, Dr. Ann McKee of the Boston University CTE Center noted that this case aligns with established patterns. A 2023 study published in the Journal of the American Medical Association indicated that 41.4% of athletes who died before age 30 showed signs of CTE. The data further suggests a higher prevalence among Black athletes; specifically, 59% of the 27 Black athletes studied were diagnosed with the condition. While suicide was the most frequent cause of death across the study cohort (57.2%), the Boston University CTE Center clarified that a postmortem CTE diagnosis is not established as a direct risk factor for suicide.

從更廣泛的流行病學角度來看，波士頓大學 CTE 中心的 Ann McKee 博士指出，此案例與既定模式一致。2023 年發表在《美國醫學會雜誌》的一項研究指出，30 歲前去世的運動員中，有 41.4% 顯示有 CTE 跡象。數據進一步顯示，黑人運動員的盛行率更高；具體而言，在接受研究的 27 名黑人運動員中，有 59% 被診斷患有此病。雖然自殺是研究組中最常見的死因 (57.2%)，但波士頓大學 CTE 中心澄清，死後診斷出 CTE 並非被確立為自殺的直接風險因素。

Institutional implications regarding athlete safety were highlighted by Dr. Chris Nowinski, CEO of the Concussion & CTE Foundation. Nowinski posited that the presence of the disease in a modern athlete—despite the implementation of contemporary concussion protocols and advanced helmet technology—indicates that current safeguards are insufficient. He argued that because CTE results from cumulative sub-concussive head impacts rather than isolated concussions, a systemic reduction in the frequency and intensity of head impacts is required to mitigate risk across all levels of the sport.

腦震盪與 CTE 基金會執行長 Chris Nowinski 博士強調了關於運動員安全的體制影響。Nowinski 認為，儘管已實施現代腦震盪處理方案和先進的頭盔技術，現代運動員中仍出現此疾病，顯示目前的防護措施不足。他主張，由於 CTE 是由累積的亞腦震盪級頭部撞擊而非單次腦震盪引起，因此需要系統性地減少頭部撞擊的頻率與強度，才能降低所有級別運動的風險。

The diagnosis of Stage 1 CTE in Marshawn Kneeland underscores the persistence of neurodegenerative risks in contact sports despite modern safety protocols.

Marshawn Kneeland 被診斷出第一期 CTE，凸顯了儘管有現代安全方案，接觸性運動中的神經退化風險依然存在。