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A lightweight division contest has been added to UFC 166 as Tony Ferguson competes against Mike Rio at the event. Ferguson has won three of four under the UFC banner, most notably defeating Yves Edwards at the UFC Ultimate Fighter 14 Finale. Rio has split both of his UFC fights, defeating John Cofer and having suffered a defeat to Francisco Trinaldo. UFC 166 takes place on October 19th from the Toyota Center in Houston, Texas with Cain Velasquez and Junior Dos Santos headlining.
