Ayaka Hamasaki
Calderwood was scheduled to face undefeated BJJ black belt Claudia Gadelha at on 13 July 2013, but Gadelha was moved into a fight against Ayaka Hamasaki after Carla Esparza suffered an injury. Calderwood was then set to face Sarah Schneider. On 23 June, Schneider also withdrew due to injury and was replaced by Norma Rueda Center. Calderwood defeated Rueda Center via unanimous decision.