CBS Local | NFL: 3 In 10 Ex-Players Face Alzheimer's, Dementia CBS Local Both the league and players' lawyers estimate that 28 percent of the retirees will develop Alzheimer's disease, moderate dementia or more serious neurological problems. That would represent nearly 6,000 of the 19,000 living former players. Dozens of ... NFL: Thousands of ex-players face cognitive woes |