A former NFL player was found to have a degenerative brain disease. The condition, known as CTE, is associated with repetitive blows to the head.

It affects not only athletes in contact sports but also combat veterans and others who experience similar head trauma.

Further details about this case are available from the source, including information about the individual who was diagnosed with early stage CTE, Dallas Cowboys defensive end Marshawn Kneeland, at the time of his death.