With Claudia Gadelha out due to an ankle injury, Calvillo now meets fellow strawweight prospect Marina Rodriguez at the Dec. 7 card in Washington, multiple sources confirmed to MMA Fighting following a report by ESPN.
Rodriguez (12-0-1) is coming off an unanimous decision win over Tecia Torres in August, boosting her UFC record to 2-0-1 after a victory against Jessica Aguilar and a majority draw versus Randa Markos.
Calvillo (8-1) has bounced back from the only loss of her career — a decision to Carla Esparza in Dec.