Researchers found a significant number of former football players had a degenerative brain disease. The condition, linked to repeated head trauma, was discovered in brains donated for research. A total of 235 brains were donated and examined, with 215 showing signs of the disease. This accounts for at least one in four players who died during a six-year period.

The study's findings were recently published, revealing the extent of the issue. Further details about the research and its implications are available.

The disease can only be diagnosed after death, making brain donation crucial for research.