FILE - In this file photo taken Jan. 31, 2013, former NFL player Troy Vincent speaks during an NFL Player Health and Safety news conference in New Orleans. Vincent, the new director of football operations, can see in the NFL's future a developmental league, an eighth official on the field for games, and coaches using tablets on the sidelines to call plays, said in an interview Friday, April 25, 2014. Vincent, president of the players' union, recently replaced Ray Anderson, who left the league to become athletic director at Arizona State. (AP Photo/Doug Benc, file)
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