FILE - In this Nov. 9, 2013, file photo, former Pittsburgh and NFL Hall of Fame running back Tony Dorsett stands on the sideline before the start of an NCAA football game between Pittsburgh and Notre Dame in Pittsburgh. Dorsett 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/Keith Srakocic, File)