Almost as quickly as McGregor dropped Donald Cerrone at U.F.C. 246, opponents lined up to be the next to face the Irish superstar.

Conor McGregor, the U.F.C.’s biggest star, stopped Donald Cerrone with a quick, explosive flurry of strikes.

With some selective spin, the mixed-martial arts promotion has been billing its biggest star as past most of his legal troubles since a loss in October 2018.

At a news conference, the U.F.C. star got help turning aside a question about two investigations in Ireland.

They cartwheel. They punch. And they are overturning centuries of tradition.

Nate Diaz and Jorge Masvidal both called for an immediate rematch after a doctor stopped their fight because of a bloody cut. Like that fight, it wouldn’t be for a championship.

A president facing a fight of his own decides to watch one at Madison Square Garden.

Nate Diaz, who fights this weekend at Madison Square Garden, is one of the U.F.C.’s top draws. The promotion isn’t as deep when it comes to stars for the future.

Despite what the fighter himself suggested on Thursday, officials said he had not violated antidoping policy.

The fighter said he did not know what substance he tested positive for, but claimed he would be unable to face Jorge Masvidal. Conor McGregor has volunteered to take Diaz’s place.