FILE - In this Oct. 7, 2011, file photo, Former Bears quarterback Jim McMahon, celebrates on stage after taking part in a ceremony honoring the 1985 Super Bowl XX Champions Chicago Bears football team, hosted by President Barack Obama, on the South Lawn of the White House in Washington. McMahon is one of more than 4,500 former players that have filed suit, some accusing the NFL football league of fraud for its handling of concussions. A federal judge on Tuesday, Jan. 14, 2014, denied preliminary approval of a $765 million settlement of NFL concussion claims, fearing it may not be enough to cover 20,000 retired players. (AP Photo/Pablo Martinez Monsivais, File)