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George Sullivan has informed the United States Anti-Doping Agency (USADA) that he may be in violation of their policies and he has been pulled from UFC On Fox 20. Sullivan was scheduled to face Hector Urbina on the card, Urbina will be booked on a future card because there is not enough time to find him an opponent. UFC On Fox 20 takes place on July 23rd from the United Center in Chicago, Illinois with Holly Holm and Valentina Shevchenko headlining.
