Calderwood was scheduled to face undefeated BJJ black belt Claudia Gadelha at Invicta FC 6: Coenen vs. Cyborg on 13 July 2013,[REF] but Gadelha was moved into a fight against Ayaka Hamasaki after Carla Esparza suffered an injury [REF].
On 11 December 2013, it was announced that Calderwood was signed by the UFC along with ten other strawweight fighters to compete on season 20 of The Ultimate Fighter, which will crown the first ever UFC women's strawweight champion [REF].