Brett Okamoto goes through Conor McGregor's fight timeline since it was announced his UFC 303 main event bout vs. Michael Chandler has been postponed. (2:11)
White also announced two more new fights to the card: Diego Lopes will face Brian Ortega in the co-main event and Carlos Ulberg will now fight Anthony Smith in a light heavyweight bout after Jamahal Hill, who was slated to fight in the co-main event, is out due to injury.
According to White, the sellout event was on pace to set a record for the UFC, with a live gate of more than $20 million. The UFC has not announced whether the nontitle welterweight bout between McGregor and Chandler will be rescheduled.
McGregor, 35, was set to return to competition for the first time since he suffered a broken leg in a TKO loss to Dustin Poirier in July 2021. The former featherweight and lightweight champion has only fought four times since a blockbuster boxing match against Floyd Mayweather Jr. in 2017.
McGregor is 1-3 in those appearances, with two losses to Poirier and a submission defeat to Khabib Nurmagomedov in a 2018 title fight.
The UFC's former drug testing partner, the United States Anti-Doping Agency (USADA), claimed McGregor's situation led to the dissolution of its UFC program, as the promotion wanted to grant McGregor an exemption of a six-month testing requirement following his leg injury. UFC chief officer Hunter Campbell denied that assertion and demanded a public apology.