Ultimate Fighting Championship president Dana White, at the event's post-fight press conference, announced that UFC 84 in Las Vegas garnered a $3.7 million gate, based on attendance of 14,773.
The event was headlined by B.J. Penn's successful title defense against former champion Sean Sherk. Feature bouts included a "Knockout of the Night" performance from Wanderlei Silva against Keith Jardine and Lyoto Machida's dominance of Tito Ortiz in what may have been Ortiz's final performance in the Octagon.
Though not the top grossing gate for mixed martial arts in Nevada, if the numbers are accurate, UFC 84 would lodge itself as the fourth highest grossing MMA event in the state.
UFC 83 in Montreal netted the promotion a gate of more than $5 million. It was the UFC's first foray into Canada. Hometown favorite Georges St. Pierre headlined the event, successfully wresting the welterweight championship back from Matt Serra.