Chronic Traumatic Encephalopathy, commonly known as CTE, remains a significant health concern within professional football. The condition is characterized by the progressive degeneration of brain tissue, which researchers believe is triggered by repeated blows to the head over an extended period. Because the disease involves complex changes in brain protein structures, it is currently impossible to identify in living patients with absolute certainty.

According to reporting from The Hill, medical science has yet to develop a reliable method for diagnosing CTE in the living. Consequently, all confirmed cases of the disease have been identified through post-mortem examinations of brain tissue. This limitation creates a significant challenge for researchers and former athletes alike, as it prevents early intervention or clinical treatment during a player's lifetime. While the medical community continues to study the link between contact sports and neurological decline, the inability to diagnose the condition in living individuals remains a central fact in the ongoing discussion regarding player safety and long-term health outcomes in the NFL.