Alistair Overeem's return to the octagon has been shifted from UFC 164 to the promotion's debut event on FOX Sports 1.

Mutiple sources close to the event today told MMAjunkie.com(www.mmajunkie.com) that Overeem (36-12 MMA, 1-1 UFC) is set to meet fellow standout heavyweight Travis Browne (14-1-1 MMA, 5-1-1 UFC) at UFC on FOX Sports 1 1, which takes place Aug. 17 at TD Garden in Boston.

Although the fight will be part of the night's main card and a major attraction, it won't even be the main event, UFC President Dana White subsequently told MMAjunkie.com. That assures at least one other significant bout will be added to the card.

Overeem originally was targeted to appear at UFC 164, which takes place Aug. 31 at Bradley Center in Milwaukee. Recently, the ex-Strikeforce champ tweeted, "Training hard and looking forward to aug 31!"

Overeem previously was scheduled to fight Junior dos Santos this weekend at UFC 160, but he was forced to withdraw from the event with an injury.

In his most recent performance at UFC 156, he suffered a knockout loss to underdog Antonio Silva, who is set to meet champ Cain Velasquez in UFC 160's headliner this weekend. That followed another setback when he tested positive for elevated levels of testosterone prior to a scheduled fight with dos Santos at UFC 146, which effectively barred him from competition for nine months.

Browne most recently fought at The Ultimate Fighter 17 Finale, where he earned a first-round knockout win over onetime heavyweight title challenger Gabriel Gonzaga. Afterward, Gonzaga appealed the bout's official result, claiming the fight should be changed to a no-contest due to illegal strikes thrown by Browne. However, the Nevada State Athletic Commission denied his request.

The win put Browne back in the winner's column after a first-round TKO loss to Silva at UFC on FX 6, which came after he tore his hamstring early in the fight.

Heavyweight Josh Barnett (32-6 MMA, 4-1 UFC) is an Ultimate Fighting Championship competitor once more.

USA TODAY Sports/MMAjunkie.com(www.mmajunkie.com) today confirmed with promotion officials that former UFC heavyweight champion Barnett has signed a new multi-fight deal with the promotion and is expected to make his return to the octagon later this year. An official announcement is expected soon.

Barnett is currently ranked No. 6 in the USA TODAY Sports/MMAjunkie.com rankings and was considered the world's most-talented free-agent heavyweight. His return date and opponent have yet to be determined.

Barnett has been fighting professionally since 1997 and made his promotional debut in 2000 with a TKO victory over Gan McGee at UFC 28. He would suffer a knockout loss to Pedro Rizzo in his next appearance before rattling off victories over Semmy Schilt, Bobby Hoffman and UFC Hall of Famer Randy Couture. The win over Couture scored Barnett the UFC's heavyweight title, though he was later stripped of the belt in 2002 after failing the evening's post-fight drug test.

Barnett spent much of the next six years fighting in Japan, where in 2006 he made it to the finals of that year's PRIDE open weight grand prix before losing to Mirko "Cro Cop" Filipovic.

In 2008, Barnett returned to the U.S., where he earned victories over Gilbert Yvel in Rizzo under the Affliction banner before that promotion folded up shop. He would later sign with Strikeforce, where he advanced to the promotion's heavyweight grand prix final before falling short against undefeated contender Daniel Cormier. Barnett bounced back with a January win over Nandor Guelmino in Strikeforce's final event.

Earlier this year, Barnett and the UFC appeared close to signing a deal, but the talks stagnated and talks briefly dissolved. However, the two parties have now reached an agreement, and "The Warmaster" is now set for an octagon return.

 The Summer Series continues for Bellator MMA as the promotion returns to Albuquerque Wednesday, July 31^st as the Santa Ana Star Center will play host to reigning Bellator Welterweight World Champion Ben Askren defending his title against Russian phenom Andrey Koreshkov live on Spike TV. The night will also feature the long awaited conclusion to the Bellator Welterweight Tournament Finals as Douglas Lima takes faces Ben Saunders in a second epic battle, while featherweights collide as Patricio Pitbull returns to battle Rob Emerson.

Askren comes to Albuquerque sporting a spotless 11-0 record and is regarded as one of the best welterweights in the world. The former US Olympian has continued to impress during his illustrious career with Bellator, and will be looking to add another title defense to his resume with a huge victory on July 31 from the Santa Ana Star Center.

“I’m really looking forward to getting back into that cage and putting on a show,” Askren said. “I feel like I’ve continued to mature and get better in every one of my fights, and July 31^st should be no different. I don’t think Andrey has any ability to stop my wrestling and ground attack, so this will be another successful title defense.”

Only 22, Koreshkov had a 2012 to remember as the Russian knockout artist was 5-0 over the year, including a tournament run that featured victories over Jordan Smith, Marius Zaromskis and Lyman Good.

"I'll be 110% ready for this fight,” Koreshkov said. “I'll make sure that Askren's tactics to put everybody in the audience to sleep won't work this time. Instead, I'll keep everybody entertained by putting him to sleep."

After two devastating knockout victories on his way to the Bellator Welterweight Tournament Finals, Douglas Lima is ready to collect his second Tournament Championship with a victory over Ben “Killa B” Saunders July 31^st. Originally schedule for March of 2013, Lima suffered a fractured hand that delayed the fight, but is fully healed and ready to capture his $100,000 prize and shot at the Bellator Welterweight Championship.

“It’s an honor to fight a fighter like Ben again,” Lima said. “With the time off I’ve been able to fully heal to 100% and like always, will be looking to finish the fight early.”

For Saunders, the South Florida native is looking to avenge his 2011 Tournament Finals loss to Lima with a signature finish and finally achieve the title shot that has since evaded him.

“Quite simply, it’s about damn time Douglas and I get back into the cage,” Saunders said. “July 31^st can’t get here soon enough. Can’t wait.”

The night will also feature the return of fan favorite and top featherweight Patrico Pitbull, as the Brazilian striker will battle California native Rob “The Saint” Emerson. After suffering just the second loss in his dominating career to the hands of reigning Bellator Featherweight Champion Pat Curran, Pitbull is eager to get back to his winning ways.

"I'm very motivated to get back in the cage, and I feel that I still haven't left totally removed myself from my fight with Curran, a lot of me is still in the fight,” Pitbull said. “But it's gone now and I have a tough opponent ahead, I'll be going stronger for this next challenge and doesn't matter how tough my opponents will be I will be stronger than I was! It's great to know I'm back."

“Our first event in Albuquerque was a huge success,” Rebney said. “With a Welterweight Title fight, the conclusion of our Welterweight Tournament, and a stacked fight card top to bottom, we’re looking at another huge night of fights July 31^st live on Spike.”

UFC interim champ Renan Barao is injured and out of next month's UFC 161 event. With little time to find a suitable replacement, the night's co-feature betweenRashad Evans (17-3-1 MMA, 12-3-1 UFC) and Dan Henderson (29-9 MMA, 6-3 UFC) has been promoted to headlining status.

UFC officials today made the change. Evans vs. Henderson remains a three-round bout.

UFC 161 takes place June 15 at MTS Centre in the Canadian city of Winnipeg. The main card airs on pay-per-view following prelims on FX and Facebook.

Evans, who had won four straight fights after losing his title to Lyoto Machida in 2009, looks to end a two-fight losing streak after dropping back-to-back decisions to current light heavyweight champion Jon Jones and Antonio Rogerio Nogueira.

The 33-year-old had flirted with the idea of a potential move down to middleweight in recent months but instead will face Henderson, who dropped a close split decision to Lyoto Machida this past month at UFC 157. The loss, which snapped a four-fight win streak and came after a 15-month injury layoff, likely cost the 42-year-old a title shot.

Barao looked to defend his interim title for a second time as champion Dominick Cruz recovers from a knee injury. Barao, who's won 30 straight fights (and five straight in the UFC), defended his interim belt for the first in February with a submission win over Michael McDonald.

His original opponent, Eddie Wineland, a former WEC champion, recently fought his way back into title contention with back-to-back wins over veterans Scott Jorgensen and Brad Pickett. Wineland's next move has yet to be announced.

With the loss of the Barao vs. Wineland contest, the UFC 161 main card has room for one more fight. It's currently unknown if UFC officials will secure a new opponent for Wineland or promote another contest from the evening's preliminary card.