More than nine in 10 former NFL players’ brains studied at Boston University found to have CTE

More than nine in 10 brains of former NFL players examined by Boston University researchers had the harmful brain condition known as CTE, the scientists said this week. Chronic traumatic encephalopathy is a disease caused by repeated head impacts — like the ones football players experience throughout a game, season and career. It can cause memory loss, personality changes and erratic behavior among other symptoms. CTE can only be diagnosed after death. “We have 376 NFL players in the bank and we found CTE in 345, roughly 91.7 percent of them,” Dr. Ann McKee, director of the Boston University C...