The UFC announced the bout on Monday night.
McMann (8-2) is coming off a majority decision loss against Miesha Tate at UFC 183 in January. The 34-year old Olympic Silver medalist in freestyle wrestling had rebounded from her title fight loss to Ronda Rousey in February 2014 with a split decision victory over Lauren Murphy. Considered one of the top women in the 135-pound division, McMann has gone 2-2 in the UFC overall.
The 27-year old Nunes (10-4), meanwhile, is coming off of a resounding victory over Shayna Baszler at UFC Fight Night 62 in Rio in March. She needed just 1:56 to put the veteran Baszler away via a TKO (leg kicks and punches). She has gone 3-1 in the UFC, with her only loss coming at the hands of Cat Zingano at UFC 178 last September.
UFC Fight Night 74 will be held at the Bridgestone Arena in Nashville, and will be headlined by light heavyweights Glover Teixeira and Ovince Saint Preux. A lightweight bout between Michael Johnson and Beneil Dariush has also been announced for the card.