Tyron Woodley submitted Rudy bears in the first round of their matchup on Friday with arm triangle to maintain his undefeated record in the main event of Strikeforce Challengers 5, which took place in Memorial Hall in Kansas City, Kansas.

Also on the Showtime televised main card, Strikeforce newcomer Kerry Vera earned a first round TKO victory over Kim Couture, Bobby Voekler weathered an early storm to defeat Erik Apple with a second round TKO, Rafael “Feijao” Cavalcante bounced back from his previous loss, defeating Aaron Rosa via second round TKO, and Kevin Casey submitted Chad Vance in the opening round.

Headliners Tito Ortiz and Forrest Griffin successfully made weight at Friday’s UFC 106 weigh-ins, as did the rest of the fighters who are set to compete at tomorrow’s event, which takes place at the Mandalay Bay Events Center in Las Vegas.

Welterweight veterans Matt Serra and Frank Trigg will square off at UFC 109 on February 6 in Las Vegas, as The Fight Network today confirmed the long-rumored bout with Serra.

The former welterweight champ Serra is coming off back-to-back losses to Georges St-Pierre and Matt Hughes, while Trigg had won four-straight before losing to Josh Koscheck in September in his return to the Octagon.

The Nevada State Athletic Commission has issued medical suspensions to 7 of the 20 fighters who were in action at Wednesday’s WEC 44 event, which took place at The Pearl at The Palms in Las Vegas.

Headliner Mike Brown, the former WEC featherweight champ who suffered a second-round knockout to Jose Aldo in the WEC 44 main event, was suspended until January 3 due to facial lacerations, while Diego Nunes, Cub Swanson, and Antonio Banuelos could be out of action until May after suffering fractures in their fights.

Main card winners Manny Gamburyan and Jose Aldo topped the $236,500 payroll for Wednesday’s WEC 44 event, which took place at The Pearl at The Palms in Las Vegas and aired live on Versus.

Gamburyan earned $36,000 for his decision win over fellow featherweight contender Leonard Garcia in the WEC 44 co-main event, while Aldo scored $26,000 (and the featherweight title) for his second-round knockout of champ Mike Brown in the event’s headliner.

Strikeforce announced on Thursday that 145-pound women’s champion Cristiane “Cyborg” Santos and newcomer Herschel Walker will both compete at a January 30 Showtime-televised event at the BankAtlantic Center in Sunrise, Florida.

A welterweight matchup between Paulo Thiago and newcomer Jacob Volkmann, previously scheduled for the non-televised UFC 106 preliminary card, has been shifted to the event’s pay-per-view main card after a bout between Karo Parisyan and Dustin Hazelett was scratched from the card on Thursday.

All 22 fighters who will be in action at Friday’s Strikeforce Challengers 5: Woodley vs. Bears event hit the scales today to weigh-in for their bouts, with the entire Showtime-televised main card, including headliners Tyron Woodley and Rudy Bears and notables Kim Couture and Kerry Vera, successfully making weight.

The event takes place at the Memorial Hall in Kansas City, Kansas and airs live on Showtime at 11pm ET (delayed on west coast).

Karo Parisyan has withdrawn from his UFC 106 welterweight matchup with Dustin Hazelett just two days before Saturday’s pay-per-view event in Las Vegas and will “not be fighting again in the UFC,” UFC President Dana White announced today on Twitter.

“Karo Parisyan has f***** over the UFC, the fans and his opponent again. He will not be fighting Saturday or ever again in the UFC,” wrote White. “Pulled out of the fight the day before weigh-ins again with a laundry list of excuses. Let the press ask Karo why. Let him explain.”

UFC 110, the UFC’s long-rumored February event in Sydney, Australia expected to be headlined by Wanderlei Silva vs, Yoshihiro Akiyama, will take place in the afternoon on Sunday, February 21, but will air live in the United States on pay-per-view on Saturday, February 20, according to MMAjunkie.

The UFC has released the medical suspensions from Saturday’s UFC 105 event in Manchester, England, with headliners Randy Couture and Brandon Vera each receiving 30 day suspensions, while five fighters, including Mike Swick and Matt Brown, could be out up to 180 days for more serious injuries.

The complete list of UFC 105 medical suspensions is after the jump…

Jose Aldo, Shane Roller, Cub Swanson, and John Franchi each earned a $10,000 “fight night” bonus for their performances at Wednesday’s WEC 44 event, WEC general manager Reed Harris announced at the card’s post-fight press conference.

Jose Aldo became the WEC’s new featherweight champion on Wednesday with a second-round TKO of title-holder Mike Brown in the main event of WEC 44, which took place at The Pearl at The Palms in Las Vegas.

Also on the Versus-televised main card, Manny Gamburyan topped fellow featherweight contender Leonard Garcia by unanimous decision, newcomer Karen Darabedyan scored a split decision win over former lightweight champ rob McCullough, Shane Roller submitted Danny Castillo with a third-round rear naked choke, and Kamal Shalorus knocked out Will Kerr in the opening round.

A rematch between UFC light heavyweight champion Lyoto Machida and Mauricio “Shogun” Rua will headline a May 1 UFC event in Montreal, Canada, UFC President Dana White confirmed with Yahoo Sports’ Dan Wetzel on Wednesday.

Machida retained the 205-pound title with a controversial unanimous decision win over Rua in their first meeting at UFC 104 in October.

UFC heavyweight champion Brock Lesnar underwent minor surgery yesterday to treat a bacterial infection in his intestinal tract and has been released from the hospital.

With Lesnar out indefinitely, White told the LA Times on Tuesday that the UFC will schedule an interim heavyweight title fight, with Carwin and fellow contender Cain Velasquez expected to square off early next year.