Michihiro Omigawa upset Hatsu Hioki on Saturday at Sengoku 11 in Tokyo, Japan, receiving a controversial split decision win in the evening’s main event. Also on the card, Mamed Khalidov extended his unbeaten streak to 18-straight by making quick work of Jorge Santiago, while notables Jorge Masvidal, Akihiro Gono, and Dave Herman also picked up wins.

Billy Evangelista remained undefeated on Friday in the main event of Strikeforce Challengers 4 in Fresno, California, earning a unanimous decision win over veteran Jorge Gurgel at the Showtime-televised card.

In other main card action, Shane Del Rosario, Luke Rockhold, Merrit Warren, and Thomas Diagne all earned victories.

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.

All 20 fighters who will be in action at tomorrow’s CBS-televised Strikeforce: Fedor vs. Rogers event in Hoffman Estates, Illinois successfully made weight today for their bouts.

Top-ranked heavyweight Fedor Emelianenko tipped the scale at 232 pounds, while his main event opponent, Brett Rogers, came in 32 pounds heavier at 264 pounds.

Strikeforce: Fedor vs. Rogers takes place tomorrow, Saturday November 7, at the Sears Centre Arena in Hoffman Estates, Illinois near Chicago. Get ready for the event by checking out MMAFrenzy.com’s Strikeforce “Fedor vs. Rogers” Roundup with pre-fight news, photos, quotes, and videos.

All 22 fighters set to participate at Saturday’s Sengoku 11th Battle event in Tokyo, Japan successfully made weight earlier today for their bouts. The official weigh-in results for the HDNet-televised event, which is headlined by Hatsu Hioki vs. Michihiro Omigawa, are after the jump.

A rumored December 19 Strikeforce event at the HP Pavilion in San Jose, California was made official at Thursday’s “Fedor vs. Rogers” press conference, with Strikeforce’s Scott Coker announcing that the Showtime-televised “Evolution” event will feature Ronaldo “Jacare” Souza’s Strikeforce debut against fellow newcomer Matt Lindland as well as the debut of Muhammed “King Mo” Lawal.

UFC welterweight champion Georges St-Pierre says a torn abductor suffered in his successful July title defense against Thiago Alves is completely healed, and that he’ll fight the winner of Mike Swick-Dan Hardy early next year, likely in March or April.

Overshadowed by Saturday’s CBS-televised “Fedor vs. Rogers” event, Strikeforce tonight hosts Strikeforce Challengers 4: Evangelista vs. Gurgel in Fresno, California. The Showtime-televised card is headlined by undefeated lightweight Billy Evangelista vs. UFC veteran Jorge Gurgel.

Dan Henderson, a former PRIDE title-holder and current middleweight contender, has likely signed with Strikeforce, UFC President Dana White recently told Yahoo Sports. According to the report, a source close to the situation confirmed Henderson had signed with Strikeforce and White echoed the news, though Strikeforce’s Scott Coker denied a deal is done.

Will Kerr has been tapped to make his WEC debut as a late-replacement for an injured Alex Karalexis, taking on fellow newcomer Kamal Shalorus at WEC 44 on November 18 in Las Vegas.

Karalexis was forced to withdraw from the bout due to a hand injury, according to the WEC’s announcement. A timeline for his return was not released.

Heavyweight challenger Shane Carwin confirmed on his official website today that UFC champion Brock Lesnar will be unable to defend his title at UFC 108 on January 2 in Las Vegas.

“My manager Jason Genet just told me that UFC 108 is not happening,” wrote Carwin. “Brock has Mono and what the UFC has told me is that I have earned the title shoot but I have to wait for the title holder.”

Under Armour, the Baltimore-based leader in performance apparel and footwear, announced today it has signed Mixed Martial Arts Welterweight Champion Georges St-Pierre to a multi-year endorsement deal.

St-Pierre, the 2008 Sportsnet Canadian Athlete of the Year, will serve as the face of Under Armour’s Underwear, one of the company’s most popular items, and will be featured in its multi-platform media campaign beginning this holiday season.

Mirko “Cro Cop” Filipovic and Ben Rothwell could square off at UFC 110, according to a post on The Underground, with both heavyweights looking to rebound from recent losses at the February 20 card in Sydney, Australia.

UFC 110, which has yet to be officially announced, is expected to be co-headlined by Wanderlei Silva’s middleweight debut against Yoshihiro Akiyama.