Attorney David Frederick, representing former NFL players, walks to the U.S. Courthouse Tuesday, April 9, 2013, in Philadelphia for a hearing to determine whether the NFL faces years of litigation ... more 
Attorney David Frederick, representing former NFL players, walks to the U.S. Courthouse Tuesday, April 9, 2013, in Philadelphia for a hearing to determine whether the NFL faces years of litigation over concussion-related brain injuries. Thousands of former players have accused league officials of concealing what they knew about the risk of playing after a concussion. The lawsuits allege the league glorified violence as the game became a $9 billion-a-year industry. (AP Photo/Matt Rourke) less 
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Associated Press | Photo By Matt Rourke
Tue, Apr 9, 2013 12:54 PM EDT