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.

Karo Parisyan has withdrawn from his UFC 106 welterweight matchup with Dustin Hazelett just two days before Saturday’s pay-per-view event in Las Vegas and will “not be fighting again in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

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.

Light heavyweights Randy Couture and Mark Coleman are expected to meet in the main event of UFC 109 on February 6 in Las Vegas, according to Sherdog, marking the first time UFC Hall of Famers will square off inside the Octagon.

Couture is coming off a win over Brandon Vera this past Saturday at UFC 105, while Coleman defeated Stephan Bonnar in his most-recent bout in July.

WEC featherweight champion Mike Brown, challenger Jose Aldo, and the rest of the WEC 44 card successfully made weight today for Wednesday’s Versus-televised event, which takes place at The Pearl at The Palms in Las Vegas.

Brown and Aldo both tipped the scale right at the 145-pound featherweight limit, while featherweight contenders Manny Gamburyan and Leonard Garcia, who co-headline the event, weighed in at 146-pounds.

UFC heavyweight champion Brock Lesnar, sidelined indefinitely from an undisclosed illness, is likely to require “major surgery” and may never fight again, UFC President Dana White today told TMZ.com.

According to White, Lesnar, who is also suffering from mono, has been hospitalized since collapsing during a trip to Canada last week. He will reportedly be transferred to the Mayo Clinic, where he’d undergo surgery for a “intestinal disorder”.

A matchup between light heavyweight contenders Rashad Evans and Thiago Silva will headline UFC 108 on January 2 in Las Vegas, the UFC today announced.

Heavyweight contenders Antonio Rodrigo Nogueira and Cain Velasquez were to meet in the card’s main event, which was announced just last week, but Nogueira was forced to withdraw from the bout due to a severe staph infection in his left elbow.

UFC heavyweight champion Brock Lesnar will be sidelined indefinitely as he continues to suffer from illnesses that recently forced him to postpone his scheduled title defense against Shane Carwin, while Antonio Rodrigo Nogueira has been forced to withdraw from his matchup with fellow heavyweight contender Cain Velasquez which was to headline UFC 108.

Randy Couture and Dan Hardy each moved one step closer to title shots in their respective divisions on Saturday with unanimous decision wins at UFC 105 in Manchester, England. Couture edged Brandon Vera in the UFC 105 main event, while Hardy topped Mike Swick in the evening’s co-headliner.

Michael Bisping, Matt Brown, and Ross Pearson were also victorious on the UFC 105 main card.

All 22 UFC 105 fighters, including headliners Randy Couture and Brandon Vera, successfully made weight on Friday for Saturday’s event at the MEN Arena in Manchester, England.

Both Couture and Vera tipped the scale at 204 pounds, while welterweight contenders Mike Swick (170) and Dan Hardy (171) and middleweight notables Michael Bisping (186) and Denis Kang (185) also made weight without issue.

A matchup between Strikeforce 145-pound women’s champion Cristiane “Cyborg” Santos and top contender Marloes Coenen is likely to take place at a January 30 Strikeforce event in Miami, Florida, according to MMA Weekly.

“Cyborg” (8-1) won the title with a first-round knockout of Gina Carano in August, her seventh-straight win, while Coenen (17-3) won her Strikeforce debut on Saturday with a first-round submission of Roxanne Modafferi.

A recently-reported matchup between heavyweight contenders Antonio Rodrigo Nogueira and Cain Velasquez will headline UFC 108 on January 2 in Las Vegas, the UFC announced on Tuesday, with the winner guaranteed a title shot against the winner of the upcoming fight between champion Brock Lesnar and challenger Shane Carwin.

The UFC also confirmed that Rashad Evans vs. Thiago Silva will co-headline the pay-per-view event.

Despite being bloodied in the opening seconds of the fight, top-ranked heavyweight Fedor Emelianenko did what most predicted he would, scoring a second-round knockout of previously undefeated Brett Rogers on Saturday in the main event of Strikeforce: Fedor vs. Rogers.

In the evening’s co-headliner, Jake Shields was crowned Strikeforce’s middleweight champion with a unanimous decision victory over Jason “Mayhem” Miller.

Former Strikeforce middleweight champion Cung Le will return to action at Strikeforce: Evolution on December 19 in San Jose, California, likely fighting Scott Smith at the Showtime-televised event.