Carneiro, Means among winners on UFC 184 prelims

Roan Carneiro def. Mark Munoz via second-round rear-naked choke

Roan Carneiro made a triumphant return to the Octagon, taking less than two minutes to polish off Mark Munoz via rear-naked choke.

Carneiro, who hadn't fought in the UFC since 2008, sprawled out of a Munoz takedown and gained top control briefly before taking "The Filipino Wrecking Machine's" back and snatching the fight-ending choke.

In a terrifying display of incompetence, referee Jerin Valel let Carneiro hold the choke dangerously long, and Munoz was rendered unconscious.

Roman Salazar vs. Norifumi "Kid" Yamamoto declared a no contest

Roman Salazar versus Norifumi "Kid" Yamamoto ended with a whimper ... or more accurately, an inadvertent eye poke.

Midway through the second frame, Salazar, likely down a round on the scorecards, lunged at Yamamoto with a looping right hand, and as "Kid" tried to avoid the shot, he accidentally poked Salazar in the eye. It was the second time in the round that Salazar suffered an eye poke.

Referee "Big" John McCarthy gave Salazar ample time to recover, but it was clear he wasn't able to see clearly out of his left eye and the ringside doctor was forced to call off the bout.

Tim Means def. Dhiego Lima via second-round TKO

Dhiego Lima quite simply wasn't ready for Tim Means.

Means wrecked Lima in the clinch, wobbling the Brazilian with a couple vicious elbows and knees early as the beleaguered Lima struggled to keep his composure and consciousness.

"The Dirty Bird" kept up the pressure, landing tight combinations before crumbling Lima with a gigantic left hand and following it up with some coffin nails before referee Herb Dean stepped in to stop the violent onslaught.

Derrick Lewis def. Ruan Potts via second-round TKO

Breaking news: Derrick Lewis hits extremely hard.

Lewis absolutely destroyed Ruan Potts with clubbing punches on the feet and on the floor for the better part of two rounds until referee John McCarthy showed mercy for the battered South African, stepping in to save him from further punishment at 3:18 of the second stanza.

Potts had a few glimmers of hope in the opening frame, working for a kneebar and a few leg locks, but Lewis was able to escape and administer some vicious ground-and-pound.