A pair of bouts have been announced by the UFC for UFC on Fox: Henderson vs. Diaz.

The card takes place December 8 from Seattle’s KeyArena. In the main event, Benson Henderson will defend his UFC lightweight crown against Nate Diaz.

Recent Ultimate Fighter winner Michael Chiesa (8-0) will make his return to action when he takes on Rafaello Oliveira.

Chiesa defeated Al Iaquinta in the finals of the show, securing the title and contract of Ultimate Fighter.

Oliveira (15-5) is 2-4 in his UFC stints.

Yagin (16-5-1) and Siver (20-8) were the last fight to be rescheduled from UFC 151. Both fighters are coming off victories earlier in the year.