Welterweights Josh Koscheck and Anthony Johnson have agreed to square off in the co-main event of UFC 106 on November 21 in Las Vegas, according to Sherdog.

Koscheck revealed on Twitter Tuesday that he’d be co-headlining the pay-per-view event, and while initial speculation focused on Matt Hughes, the knockout artist Johnson was ultimately tapped for the short-notice addition to the event.

Welterweight Josh Koscheck has announced via Twitter that he’ll be co-headlining UFC 106 on November 21 in Las Vegas.

An opponent has not yet been announced for the bout, a late-addition to bolster the card currently headlined by Tito Ortiz vs. Forrest Griffin after losing Brock Lesnar vs. Shane Carwin, its original main event, on Monday. One potential opponent, Matt Hughes, has reportedly turned down the short-notice matchup, with Anthony Johnson now the speculated front-runner.

UFC 104 winners Lyoto Machida and Patrick Barry were among eight fighters from Saturday’s event in Los Angeles who were issued medical suspensions by the California State Athletic Commission on Tuesday.

Machida, the UFC’s light heavyweight champ who won a controversial decision over Mauricio “Shogun” Rua in the UFC 104 headliner, was suspended for 60 days for a lip laceration, potentially delaying an immediate rematch with Rua that was reportedly being planned for UFC 108 on January 2.

UFC light heavyweight champ Lyoto Machida and challenger Mauricio “Shogun” Rua, who headlined Saturday’s UFC 104 event in Los Angeles, topped the pay-per-view event’s disclosed $922,000 fighter payroll, according to figures released Tuesday by the California State Athletic Commission.

Machida earned an event-high $200,000 for his controversial main event win over Rua, while “Shogun” received $155,000 for his efforts. Other top earners included Joe Stevenson ($94,000), Cain Velasquez ($70,000), and Chael Sonnen ($54,000).

Brock Lesnar’s training partner at Minnesota Martial Arts Academy and fellow UFC heavyweight Chris Tuchscherer talked to the Las Vegas Sun about Lesnar’s illness and his decision to withdraw from his November title defense against Shane Carwin, which has since been rescheduled for UFC 108 on January 2:

He actually practiced (Sunday) and thought he might be feeling alright. He said, ‘Wow, I think I’m doing OK today,’ (Monday) he got here and it was the same old stuff — fatiguing right away, not being all there.”

UFC heavyweight champion Brock Lesnar has been forced to withdraw from his scheduled title defense against Shane Carwin at UFC 106 on November 21 in Las Vegas due to an illness that has prevented him from training for nearly a month, UFC President Dana White confirmed to Yahoo! Sports on Monday.

According to a post by Carwin on Twitter, the fight has been rescheduled for UFC 108 on January 2 in Las Vegas, leaving Tito Ortiz vs. Forrest Griffin to headline UFC 106.

Lightweight prospect Ronnys Torres is slated to make his UFC debut against Melvuin Guillard at UFC 109 on February 6 in Las Vegas, according to Tatame. Torres has won eight-straight with just one fight going the distance, while Guillard had won three in-a-row before he was submitted by Nate Diaz in September.

A welterweight matchup between Paulo Thiago and newcomer Jacob Volkmann has been added to the upcoming UFC 106 card on November 21 in Las Vegas, according to Terra.

Thiago had been scheduled to fight Thiago Alves at UFC 107, but was pulled from the matchup in favor of having Alves rematch Jon Fitch at the December 19 event in Memphis and will instead return to action next month at UFC 106, which is headlined by Brock Lesnar vs. Shane Carwin.

A previously-unreported lightweight matchup between Shane Nelson and Matt Wiman, as well as a middleweight bout between Lucio Linhares and Rousimar Palhares originally rumored for The Ultimate Fighter 10 Finale, are among the latest additions to the official fight card for UFC 107 on December 19 in Memphis, Tennessee.

Patrick Barry scored an extra $120,000 on Saturday, earning two $60,000 “Fight Night” bonuses for his second-round knockout of Antoni Hardonk at “UFC 104: Machida vs. Shogun” at the Staples Center in Los Angeles. Hardonk and Stefan Struve also picked up $60,000 bonuses for their showings at last night’s pay-per-view event.

UFC light heavyweight champ Lyoto Machida and Mauricio “Shogun” Rua have agreed to an immediate rematch following Machida’s controversial decision win over Rua on Saturday in the main event of UFC 104.

“I thought “Shogun” won the fight. I think there will be a rematch.” said UFC President Dana White at the post-fight press conference. “I talked to both of them and they both agreed to a rematch.”

The “Machida Era” was extended in controversial fashion on Saturday, as light heavyweight champ Lyoto Machida was awarded a questionable unanimous decision win over Mauricio “Shogun” Rua in the main event of UFC 104 at the Staples Center in Los Angeles.

Cain Velasquez dominated Ben Rothwell in the UFC 104 co-headliner, while Gleison Tibau, Joe Stevenson, and Anthony Johnson also earned main card wins.

Welterweight Anthony Johnson, who weighed in 6 pounds over the 170 pound division limit on Friday for tonight’s UFC 104 event, talks to Heavy.com about missing weight and a future move up to middleweight.

“I was in the sauna for an hour and I lost three or four pounds right off the bat. I knew it was coming off. That’s why I said that if I had another hour or two, I would have been able to make it. I got out of the sauna, and I think I was out too long because my sweating stopped, and when I got back in the sauna I couldn’t get anything else off. That’s what broke me.”

Welterweights Martin Kampmann and Rory Markham have reportedly agreed to square off at UFC 108 on January 2 in Las Vegas. Following his win over former WEC champ Carlos Condit, Kampmann was knocked out by Paul Daley in September, while Markham had his UFC record evened at 1-1 with a loss to Dan Hardy in February.

Welcome to MMAFrenzy.com’s live coverage of UFC 104, which takes place today at the Staples Center in Los Angeles. The pay-per-view event is headlined by light heavyweight champion Lyoto Machida in his first title defense against challenger Mauricio “Shogun” Rua, as well as a co-main event between heavyweight contenders Cain Velasquez and Ben Rothwell.

MMAFrenzy.com’s live UFC 104 coverage begins at 7:30pm ET with preliminary card results, followed by live coverage of the Spike TV card at 9pm and the PPV main card beginning at 10pm.