LAS VEGAS - On Saturday night in Las Vegas, Roy Nelson did what Roy Nelson does best: Walk forward, opponent be damned, and wing right hands.

And while his gutsy performance earned "Big Country" one-half of UFC 143's "Fight of the Night" bonus, the loss leaves Nelson at just 1-3 in his past four fights.

So despite earning one of the loudest welcomes of the night from the Mandalay Bay Events Center Crowd, is Nelson's spot in the UFC's heavyweight division secure?

LAS VEGAS - UFC president Dana White understands why Nick Diaz is upset, even if he doesn't agree with the fighter's belief that he won Saturday's UFC 143 main event.

He also understands if Diaz goes through with an announced retirement, even if he thinks it'd be financially foolish to do so.

Quite simply, White has given up on trying to predict the 28-year-old's often-erratic behavior.

LAS VEGAS - The Ultimate Fighting Championship's own media notes on Brazilian bantamweight Renan Barao sum it up nicely: "Has best record, on paper, in all of MMA."

On Saturday night, Barao earned his 28th-straight win by downing onetime title-challenger Scott Jorgensen via unanimous decision.

The 24-year-old is now 5-0 under the Zuffa banner, and while UFC president Dana White isn't ready to grant him a title shot just yet, he admits the Nova Uniao product is quickly becoming one of Brazil's most popular fighters.

LAS VEGAS - UFC 143 winner Josh Koscheck dropped the first hint of trouble at this past Thursday's pre-fight press conference, when he talked about the importance of "Team Me."

Following his split-decision win over Mike Pierce at Saturday's event in Las Vegas, Koscheck opened the flood gates.

"I'll be training out of Fresno for now," Koscheck told MMAjunkie.com. "I'm no longer affiliated with some of the people at the gym that I've been training at."

LAS VEGAS - Depending on who you talk to, Carlos Condit's unanimous-decision win over Nick Diaz in the main event of Saturday night's UFC 143 event in Las Vegas was either a brilliantly designed and perfectly executed gameplan or a mockery of mixed martial arts.

While it's obvious, of course, which Condit believes, you can also count UFC president Dana White among those who thinks the "Natural Born Killer" did all the right things.

"Carlos Condit won," White said following the evening's post-event press conference. "He went in there, and he fought a great fight."

Carlos Condit earned the biggest win of his career on Saturday night, outpointing former Strikeforce titlist Nick Diaz to capture the UFC interim welterweight championship at UFC 143.

ATLANTIC CITY, N.J. -- A pair of title fights topped the 13th edition of Cage Fury Fighting Championships at Resorts Casino Hotel Saturday night.

UFC middleweight champion Anderson Silva took part in a belt-promotion ceremony at Team Nogueira in Rio de Janiero

LAS VEGAS - The rematch is happening.

At Saturday night's UFC 143 post-fight press conference, UFC president Dana White confirmed that both UFC middleweight champ Anderson Silva and his nemesis Chael Sonnen have verbally agreed to meet in Brazil on an as-yet-undetermined date in June.

Silva was in Las Vegas for Saturday's fight card, and White said an agreement was reached during the event.

LAS VEGAS - Saturday's "UFC 143: Diaz vs. Condit" event drew a reported 10,040 attendees and generated a live gate of $2.3 million.

UFC president Dana White revealed the figures at the evening's post-event press conference, which MMAjunkie.com attended.

Featuring an interim welterweight title contest between former WEC titleholder Carlos Condit and former Strikeforce champ Nick Diaz, UFC 143 marked the company's first 2012 event in Las Vegas.

Four fighters walked away from the Mandalay Bay Events Center in Las Vegas with post-fight bonuses on Saturday night, as Fabricio Werdum, Roy Nelson, Stephen Thompson and Dustin Poirier each took home an additional $65,000 at UFC 143.

Nick Diaz is done, apparently.

LAS VEGAS - Stephen Thompson, Dustin Poirier, Fabricio Werdum and Roy Nelson each earned $65,000 fight-night bonuses for their performances at Saturday's UFC 143 event.

Thompson earned the night's "Knockout of the Night" award, Poirier picked up the "Submission of the Night" bonus, and Werdum and Nelson earned "Fight of the Night" honors.

MMAjunkie.com learned of the bonus winners and award amounts at UFC 143's post-fight press conference.

For the first time in nearly four years, someone other than Georges St. Pierre wears welterweight gold in the Ultimate Fighting Championship.

LAS VEGAS - Carlos Condit solved one of the most challenging puzzles in MMA.

The former WEC champ implemented a remarkably effective game plan and won the UFC's interim welterweight title by stifling ever-active but ultimately frustrated ex-Strikeforce titleholder Nick Diaz, who suggested he may retire after the loss.

The fight headlined UFC 143 and aired on pay-per-view from Las Vegas' Mandalay Bay Events Center. Prelims aired on FX and streamed on Facebook.

LAS VEGAS - After three-and-a-year absence from the organization and picking up some major wins in Strikeforce, Fabricio Werdum made a successful return to the UFC.

The Brazilian heavyweight outlasted and even out-struck fellow big man Roy Nelson en route to a unanimous-decision victory.

The fight co-headlined UFC 143 and aired on pay-per-view from Las Vegas' Mandalay Bay Events Center. Prelims aired on FX and streamed on Facebook.

LAS VEGAS - After Mike Pierce called him out on MMAjunkie.com Radio and ultimately got the fight he wanted, opponent Josh Koscheck labeled him a stepping stone and promised to send him back to the welterweight division's middle of the pack.

Koscheck earned a close decision win, but Pierce's stock will suffer little.

The main-card bout was part of UFC 143 and aired on pay-per-view from Las Vegas' Mandalay Bay Events Center.

LAS VEGAS - Renan Barao survived arguably the biggest test of his MMA career and scored a unanimous-decision victory over former WEC bantamweight title challenger Scott Jorgensen.

The impressive performance earned Barao his 28th straight win and solidified his status as one of the UFC's top 135-pound contenders.

The main-card bout was part of UFC 143 and aired on pay-per-view from Las Vegas' Mandalay Bay Events Center. Prelims aired on FX and streamed on Facebook.

LAS VEGAS - Ed Herman's career resurgence shows no signs of slowing down.

For the third time in three fights since an extended injury layoff due to knee injuries, the veteran middleweight picked up an impressive victory - this time against a game Clifford Starks.

The main-card bout was part of UFC 143 and aired on pay-per-view from Las Vegas' Mandalay Bay Events Center. Prelims aired on FX and streamed on Facebook.

The ascent of Dustin Poirier shows no signs of slowing down.