In the main event, Lyoto Machida also suffered his first submission loss at the hands of Jon Jones.

However, White, after discovering that Davis was still recovering from a knee injury, admitted to "[jumping] the gun" on the announcement .

[1] Early reports also included a Light Heavyweight Championship bout between Jon Jones and Rashad Evans.

First, Evans would need to be medically cleared following an operation that required pins to be inserted into his right hand due to an injury during his technical knockout victory over Tito Ortiz.

In that match, Mir became the first person to defeat Nogueria by stoppage, due to a technical knockout in the second round.

[9] UFC 140 consisted of twelve mixed martial arts bouts sanctioned by Ontario's Athletics Commissioner under the MMA rules established by the New Jersey State Athletic Control Board and often referred to as the Unified Rules of Mixed Martial Arts.

[14] Cholish won the fight at 4:36 of the second round, due to a technical knockout, giving Clarke his first ever professional MMA loss.

[14] Jake Hecht, in his UFC debut, defeated Rich Attonito by technical knockout at 1:10 of the second round.

Makdessi rolled over in an attempt to defend himself, resulting in Hallman taking his back and applying a rear-naked choke.

Dennis Hallman gave John Makdessi his first career loss due to submission with the rear-naked choke at 2:58 of the first round.

The last punch resulted in Hamman falling face first to the mat, at which point John McCarthy ended the fight.

[14] Costas Philippou earned his second straight UFC victory by defeating Jared Hamman at 3:11 of the first round via knockout.

The final bout of the preliminary card consisted of light heavyweights Krzysztof Soszynski and Igor Pokrajac.

Thirty-five seconds into the first round, referee Yves Lavigne stopped the fight, giving Igor Pokrajac the knockout victory.

Nogueira furthered his attack by attempting to take Mir's back and apply a choke submission.

The official decision was that Frank Mir defeated Antônio Rodrigo Nogueira by technical submission due to the kimura at 3:38 of the first round.

As a result of this fight, Mir was awarded the event's "Submission of the Night" and earned the distinction of not only being the first man to knock out Nogueira, but also the first to submit him.

In the second round, Jones opened a gash on Machida's forehead, at which point the referee, John McCarthy, suspended the match for the cage-side doctor to look at it.

Machida refused to tap out and fell to the floor unconscious when Jones released him as the ref stopped the bout.

[24] Frank Mir's victory over Antônio Rodrigo Nogueira moved him one step closer to a championship fight of his own.

April 4, 2012, Alistair Overeem was revealed to have failed his pre-fight drug test by the Nevada State Athletic Commission (NSAC).

On Friday April 20, 2012, UFC President Dana White confirmed that Overeem has been removed from his fight with Dos Santos and replaced by Frank Mir.