A lawsuit filed in Philadelphia by more than 2,000 former NFL players accusing the league of hiding information that linked football-related head injuries to permanent brain injuries. It is the biggest sports lawsuit ever and the former players allege that the league promoted the violence in the game and didn't advise of the link between head trauma and permanent brain injuries.
The league has denied similar accusations in the past.
"Our legal team will review today's filing that is intended to consolidate plaintiffs' existing claims into one "master" complaint," the NFL said in a statement. "Any allegation that the NFL sought to mislead players has no merit."
Currently, the NFL provides medical benefits to former NFL players to help them after football. One of the programs provides funding to treat dementia, Alzheimer's disease and amyotrophic lateral sclerosis.
The players are accusing the NFL of negligence in its response to the headaches, dizziness and dementia that have been reported by former players.