The NCAA is widening its investigation into sports wagering among student-athletes, announcing on Thursday that 13 former men’s basketball players from six universities are now facing potential violations. The NCAA emphasized that it does not believe coaches, staff members, or the schools themselves were part of the misconduct. Instead, the investigation is focused solely on the actions of the former players, all of whom are no longer enrolled at their respective institutions. The NCAA said it will wait until the infractions process is complete before disclosing any of the athletes’ names. It explained that Thursday’s update was issued only because the cases had already been widely reported in the media.