Chicago Bears offensive lineman Keith Van Horne once played an entire season with a broken leg. He wasn’t even told about the injury until five years later. So how could he keep playing? Pills. A lot of Pills. A new lawsuit brought by more than 500 former players asserts that “the league obtained and administered the drugs illegally, without prescriptions and without warning players of their potential side effects, to speed the return of injured players to the field and maximize profits.”