January 10, 2013 - The National Institutes of Health releases the results of their analysis of Junior Seau's brain tissue confirming that Seau did suffer from chronic traumatic encephalopathy (CTE).
January 23, 2013 - Junior Seau's family files a wrongful death lawsuit against the NFL, claiming that Seau's suicide was the result of a brain disease caused by violent hits he endured while playing the game.
August 29, 2013 - The NFL and ex-players reach a deal in the class action lawsuit that calls for the NFL to pay $765 million to fund medical exams, concussion-related compensation, medical research for retired NFL players and their families, and litigation expenses, according to a court document filed in U.S. District Court in Philadelphia. The agreement still needs to be approved by the judge assigned to the case, which had grown to include more than 4,500 plaintiffs.
November 25, 2013 - Ten former players of the National Hockey League file a class action lawsuit against the league with regards to brain trauma.