Usman (16-1) told ESPN on Tuesday that he has been training since February and has offered to defend his 170-pound UFC championship in April, May, June and now July.
Many expected Usman’s next title defense to come against Masvidal (35-15), who has expressed interest in a non-title rematch against Nate Diaz in recent days.
If Masvidal is not available, Usman said he’ll ask the UFC to book him against McGregor (22-4), a former two-weight champion who has expressed interest in a summer return.
“This is what I have to say: Both [McGregor and Masvidal],” Usman said. “Both guys are champions of Twitter, talking s— on Twitter. In the history [of MMA], who has ever said no to a title shot? I’m that guy. I’m the boogeyman who these guys are saying no to a title shot against. And they better remain quiet.
“Jorge Masvidal, you had an opportunity on April 18, May 9, June and now July. You want to fight Nate — a fight that wasn’t even competitive. And Conor, you said you wanted to be the king of the 170-pound division. Now you’re quiet. So you know what? Just remain quiet. I’ve given both of you a shot, and none of you have taken it.”
The bout was being planned for UFC 252 live in July.