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A lightweight division contest has been added to UFC 173 as Michael Chiesa is in action against Francisco Trinaldo. Chiesa has won three of four fights under the UFC banner and he was the winner of the UFC Ultimate Fighter 15. Trinaldo has won four of six in UFC competition, with a notable victory over Mike Rio at UFC On FX VIII. UFC 173 takes place on May 24th from the MGM Grand Garden Arena in Las Vegas, Nevada with Chris Weidman and Lyoto Machida headlining.
