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PHOENIX, ARIZONA - JANUARY 14: (L-R) Yair Rodriguez of Mexico and BJ Penn face off during the UFC Fight Night weigh-in at the Talking Stick Resort Arena on January 14, 2017 in Phoenix, Arizona. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

PHOENIX, ARIZONA - JANUARY 14:  (L-R) Yair Rodriguez of Mexico and BJ Penn face off during the UFC Fight Night weigh-in at the Talking Stick Resort Arena on January 14, 2017 in Phoenix, Arizona. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)