On February 1, 2014, at UFC 169 Aldo defended his title by defeating Ricardo Lamas by unanimous decision (49–46, 49–46, and 49–46).
A rematch with Chad Mendes was expected to take place on August 2, 2014, in the event headliner at UFC 176. However, in early July, Aldo pulled out of the bout with an injury. The rematch with Mendes was subsequently rescheduled and took place for October 25, 2014 at UFC 179. Despite getting dropped in the first round and being rocked in the third, Aldo scored two knockdowns of his own, one in the first and the other in the third and also rocked Mendes throughout the fight, winning four of the five rounds in the eyes of the judges thus taking the fight by unanimous decision (49–46, 49–46, and 49–46). The win also earned him his third Fight of the Night bonus award, and was selected Fight of the Year by multiple MMA outlets.
To date, Aldo has defended 91% of his opponents' takedown attempts. On September 28, 2014, at Nova União, under the tutelage of Mestre Roberto Leitão (10th Dan), Daniel F. A. Malvino "Pirata" (1st Dan), Marco Ruas (7th Dan) and Daniel D'dane (4th Dan), Aldo was awarded his black belt in Luta Livre. His Luta Livre instructor lineage is as follows: Roberto Leitão Sr. → João Ricardo N. de Almeida → Marco Ruas → José Aldo.