The classic battle of youth vs. experience is now official, as both Jon Jones and Vladimir Matyushenko made weight for their UFC on Versus 2 clash.

Today's weigh-in ceremonies, which saw all but one of the 20 competitors from Sunday's Versus-televised card make weight on their first pass across the stage, took place at the San Diego Sports Arena.

The same venue hosts Sunday's 10-fight event.

SAN DIEGO - Official fighter weigh-ins for UFC on Versus 2 take place today, and you can catch a live video stream of the proceedings here on MMAjunkie.com beginning at 7 p.m. ET (4 p.m. PT).

Today's festivities take place at the San Diego Sports Arena in California. Prior to the weigh-ins, you can also watch a live stream of the UFC Fight Club Q&A session with Krzysztof Soszynski at 5 p.m. ET.

In addition to the video stream, you can get live updates of the weigh-ins in our text-only results post on the MMAjunkie.com homepage.

UFC president Dana White says fast-rising light-heavyweight contender Jon Jones is undoubtedly one of the sport's top prospects.

However, he also says that the UFC on Versus 2 headliner has some big tests to pass before he's considered one of the sport's best.

In our official event preview, MMAjunkie.com's Steven Marrocco breaks down the latest test and why veteran opponent Vladimir Matyushenko thinks his years of experience could be the deciding factor in the Vesus-televised fight.

It's been nearly 20 months since UFC middleweight Mike Massenzio stepped into the octagon.

After injuries and illness kept him away for so long, Massenzio surely feels the pressure going into his fight with former WEC champion Brian Stann on Sunday at UFC on Versus 2, right?

"I try not to think of it like that," Massenzio recently told MMAjunkie.com. "I love to fight, and I love to be in the UFC."

The main card for September's WEC 51 event now appears complete.

World Extreme Cagefighting officials recently moved a featherweight bout between "The Korean Zombie," Chan Sung Jung, and opponent George Roop from the preliminary card to the night's Versus-televised main card.

The five-fight televised lineup is now set for the card, which takes place Sept. 30 at the 1STBANK Center in Broomfield, Colo.

The flow of massive wrestlers into mixed martial arts continues, and former Oklahoma State Cowboy Jared Rosholt is the next heavyweight ready to make the plunge.

Team Takedown boss Ted Ehrhardt revealed on Thursday to MMAjunkie.com Radio that Rosholt has joined brother Jake, WEC lightweight contender Shane Roller, and UFC welterweight Johny Hendricks on the Team Takedown roster.

"We have signed a new fighter - Jake's brother, Jared Rosholt," Ehrhardt said. "He's a three-time All-American, and he finished second in nationals this year."

As a reminder, submissions for the upcoming edition of "The Sunday Junkie" are due Sunday at 10 a.m. ET.

All topics are open for discussion. The person who sends in the submission we deem the best - based on timeliness of subject, clarity and overall persuasiveness - will be invited onto MMAjunkie.com Radio to discuss the topic.

Each winner will also receive a free year's subscription to Fighters Only, the world's leading MMA and lifestyle magazine!

While Zuffa, LLC - the parent-company of the Ultimate Fighting Championship and World Extreme Cagefighting - has traditionally been voracious in terms of protecting its product, Thursday night's revelation that the company was suing the Bellator Fighting Championships, as well as influential agent Ken Pavia, came as quite a surprise.

Bellator officials were just as taken aback, according to the company's newly hired attorney, Patrick English.

"I was asked to represent Bellator yesterday when they heard there had been a lawsuit filed," English told MMAjunkie.com. "Originally, they had no idea what it was about. It was actually Kevin Iole who was kind enough to tell me what it was about."

Here comes the Hammer.

Stanley Burrell, also known as MC Hammer, announced today that he's getting into the MMA business with Alchemist Management, a new management and "brand-building" firm based out of Los Angeles.

"I've been a fan of combat sports for years," MC Hammer stated today in a press release. "MMA is the fastest growing sport in the world and this is a great opportunity for us to launch a full-service management company."

With Brazilian slugger Thiago Silva forced to bow out of UFC 117 due to injury, the UFC turned to promotion newcomer Todd Brown to fill the gap.

Today, UFC officials made the switch official.

As MMAjunkie.com reported earlier this week, Brown now faces Tim Boetsch on the UFC 117 preliminary card.

It's only been four months since Mark Munoz's gym officially opened, but much like his life, everything has moved so fast.

The Lake Forest, Calif.-based Reign Training Center has gone from a room with a mat to a full-fledged hotbed of talent with Munoz (8-1 MMA, 3-1 UFC) as a beacon for fighters in need of good wrestling.

He's now a successful fighter in the UFC's middleweight division after uprooting his family to Southern California in September 2008 with no idea of where he'd end up. 

The Ultimate Fighting Championship is primed to take over Northern California.

With the anticipation high for August's "UFC 117: Silva vs. Sonnen" event in Oakland, the UFC has scheduled several fan-friendly activties surrounding fight week.

As MMAjunkie.com previously reported, the open workout sessions on Wednesday, Aug. 4, are free to attend, and the UFC has announced an autograph session prior to Friday's weigh-ins, as well.

Bellator Fighting Championships featherweight champion Joe Soto and season-two tournament winner Joe Warren will clash on Sept. 2.

As was first reported by MMAjunkie.com, Soto and Warren meet in the main event of Bellator 27.

Bellator officials today announced the matchup for the card, which takes place at the Majestic Theatre in San Antonio, Texas.

A welterweight match-up between Mike "The Joker" Guymon and Daniel Roberts is targeted for UFC 121.

Sources close to the event today confirmed to MMAjunkie.com that verbal agreements are in place with bout agreements expected to be signed shortly.

UFC 121 takes place Oct. 23 at the Honda Center in Anaheim, Calif., and features a heavyweight title match between current champion Brock Lesnar and challenger Cain Velasquez.

The UFC will hold its first-ever European-based MMA exposition in conjunction with October's UFC 120 event, the organization today announced.

As MMAjunkie.com first reported UFC Fan Expo London 2010 will be held Friday and Saturday, October 15-16, at the Earls Court Exhibition Centre with meet-and-greet sessions with UFC fighters, MMA demonstrations, fan-inspired special events, training and development sessions, and other activities.

Featuring a middleweight contest between Michael Bisping and Yoshihiro Akiyama, UFC 120 takes place October 16 at the O2 Arena in London.

MMAjunkie.com Radio today welcomes a plethora of expert analysts to the show to break down this weekend's combat sports action, as well as Wand Fight Team prospect Jorge Lopez.

Top trainer Marc Laimon comes in-studio to breakdown UFC on Versus 2, while MMA oddsmaker Joey Oddessa calls in to offer his expert opinion as well. Percy Crawford of FightHype.com also joins us via phone to share his wisdom on the latest in boxing, while Lopez previews his fight at Saturday's MMA Xplosion show in Las Vegas.

MMAjunkie.com Radio airs from 12-2 p.m. ET (9-11 a.m. PT) live from the Mandalay Bay Resort & Casino's Race & Sports Book. Listen to and watch a video stream of the two-hour show at www.mmajunkie.com/radio.

As a reminder, submissions for the upcoming edition of "The Sunday Junkie" are due Sunday at 10 a.m. ET.

All topics - including this weekend's UFC on Versus 2 event and the busy schedule coming in August  - are open for discussion. The person who sends in the submission we deem the best - based on timeliness of subject, clarity and overall persuasiveness - will be invited onto MMAjunkie.com Radio to discuss the topic.

Each winner will also receive a free year's subscription to Fighters Only, the world's leading MMA and lifestyle magazine!

Former UFC light-heavyweight champion, "The Ultimate Fighter" winner and best-selling author Forrest Griffin is at it again.

Griffin and publisher William Morrow are set for an August release of "Be Ready When the Sh*t Goes Down: A Survival Guide to the Apocalypse," the follow-up to the fighter's best-selling debut, "Got Fight?"

In support of the release, Griffin will soon embark on a nine-day, nine-city book signing tour that includes visits to New York, New Jersey, Pennsylvania, California and Nevada.

UFC heavyweight Ben Rothwell sat at UFC 115's post-fight podium and made no excuses.

He had won a unanimous decision over Gilbert Yvel on the June 12 event's pay-per-view card but said it was "not a victory" for the fight's lack of finish. He chose not to disclose that he had torn his ACL on the first takedown of the three-round contest.

Rothwell on Tuesday underwent surgery to repair both his ACL and a torn meniscus and hopes to be back in action by February or March of 2011.

While most MMA pundits wouldn't consider Bellator Fighting Championships and the UFC direct rivals, they soon will be - in court.

According to a report by Yahoo! Sports' Kevin Iole, Zuffa, LLC, the parent company of the Ultimate Fighting Championship, has filed suit in a Nevada court against MMA Agents' head Ken Pavia and the Bellator organization.

At the center of the concern is alleged theft of "trade secrets and confidential Zuffa documents," which Zuffa contends Pavia passed along to Bellator officials.