Jay-Z's Roc Nation Sports client list

Robinson Cano #24 of the New York Yankees poses during a portrait session on July 5, 2011 in Cleveland, Ohio. (Photo by Chris Covatta/MLBPA via Getty Images)

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Jay-Z founded his sports agency this year and has already made aggressive moves in the sports world. In a few months he has managed to develop a strong client list of powerful athletes.

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