Trump's attendance at the event wasn't just noted by the MMA fanbase and media, as the scenes outside Madison Square Garden showed crowds of placard-holding protesters had gathered to show their displeasure at their commander-in-chief's presence in The Big Apple.
Masvidal took on Diaz for the BMF title in the UFC 244 headliner in Madison Square Garden, New York. Demonstrators chanted "Danger, danger, there's a fascist in the White House" over a bullhorn and held signs that read "Trump/Pence Out Now", according to NJ.com.
Lewis was the only victor who mentioned Trump, and the crowd of almost 20,000 seemed largely uninterested in him.
"He called me the night that he was elected and told me to get down to the afterparty, and I went, and he wanted to come to the Conor McGregor fight the next night", White said (thanks to MMAjunkie for the quotes).
Mr Trump is now facing an impeachment probe relating to allegations he pressured Ukraine's President Volodymyr Zelensky to investigate his rival in the 2020 White House race, former Vice President Joe Biden.
It was the second time in less than a week that Trump was booed at a sporting event. "Back in the day he was on Wrestlemania", said Mr Ferranti, referring to Mr Trump's infamous scripted bodyslam of World Wrestling Entertainment president Vince McMahon in 2007.
Eric Trump, the president's other son, said the crowd was chanting, "President Trump. USA". The pay-per-view spectacle was expected to draw several celebrities, including wrestler-turned-actor The Rock. Mr. Trump agreed to host a number of fights at the Trump Taj Mahal in Atlantic City, giving the U.F.C. a lifeline. He changed his official residency from New York City to his Palm Beach Mar-a-lago Club.
UFC 244 proved to be a big night for the UFC, and a proud Dana White sat down at the dais for the post-fight press conference a contented man. "You gotta turn that s*** around in 2020". That's going to be a rough one! "If you want to boo, you can boo". Enrique Bordier, 35, said he did not know Mr. Trump was attending the fight until a taxi driver told him on Saturday morning.
Masvidal said: "Very humbling moment".