Nfl

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St. Louis Rams defensive end Michael Sam listens to a question while meeting with the media following an organized team activity at the NFL football team's practice facility Friday, June 6, 2014, in St. Louis. (AP Photo/Jeff Roberson)

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Houston Texans No. 1 overall draft pick Jadeveon Clowney, a defensive end from South Carolina, holds up his new jersey during an introductory NFL football news conference Friday, May 9, 2014, in Houston. (AP Photo/Pat Sullivan)

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San Francisco 49ers quarterback Colin Kaepernick answers question during an NFL football press conference on Wednesday, June 4, 2014, in Santa Clara, Calif. (AP Photo/Marcio Jose Sanchez, file) ** FILE **

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Image: NFL

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The NFL logo for Super Bowl 50 (via Twitter)

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Cleveland Browns wide receiver Josh Gordon makes a catch during organized team activities at the NFL football team's facility in Berea, Ohio Wednesday, May 28, 2014. (AP Photo/Mark Duncan)

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New York Giants quarterback Josh Freeman holds footballs during an NFL football organized team activity, Thursday, May 29, 2014, in East Rutherford, N.J. (AP Photo/Julio Cortez)

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New York Giants quarterback Josh Freeman, left, hands off to running back David Wilson during an NFL football organized team activity, Thursday, May 29, 2014, in East Rutherford, N.J. (AP Photo/Julio Cortez)