UFC 279: Diaz vs. Ferguson was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on September 10, 2022, at the T-Mobile Arena in Paradise, Nevada, part of the Las Vegas Metropolitan Area, United States. A welterweight bout between Khamzat Chimaev and former lightweight title challenger (also The Ultimate Fighter 5 lightweight winner) Nate Diaz was originally expected to headline the event. However at the weigh-ins, Chimaev weighed in at 178.5 pounds, 7.5 pounds over the welterweight non-title limit and the bout was cancelled. As a result, the organization opted to shuffle a trio of fights: a new main event featuring Diaz against former interim UFC Lightweight Champion (also The Ultimate Fighter: Team Lesnar vs. Team dos Santos welterweight winner) Tony Ferguson, who was originally scheduled to face Li Jingliang in a welterweight bout, was then set.
Nate Diaz
Tony Ferguson
Khamzat Chimaev
Kevin Holland
Daniel Rodriguez
Li Jingliang
Irene Aldana
Macy Chiasson
Johnny Walker
Ion Cuțelaba
Julian Erosa
Hakeem Dawodu
Jailton Almeida
Anton Turkalj
Denis Tiuliulin
Jamie Pickett
Chris Barnett
Jake Collier
Norma Dumont Viana
Danyelle Wolf
Heili Alateng
Chad Anheliger
Elise Reed
Melissa Martinez
Yohan Lainesse
Darian Weeks