As written on Canwest News Service (http://www.windsorstar.com/sports/Lesnar+bows+unspecified+illness/2149941/story.html) and MMAjunkie.com (http://mmajunkie.com/news/16735/ill-champ-brock-lesnar-now-out-of-ufc-108-opponent-shane-carwin-says.mma)

UFC heavyweight champion Brock Lesnar has withdrawn from his upcoming title defense against Shane Carwin because of an illness.

Lesnar was scheduled to fight Carwin in the main event of UFC 106 on Nov. 21 at the Mandalay Bay Events Center in Las Vegas. The former professional wrestler and college wrestling champion said Monday he’s been out of training for nearly a month while battling the unspecified illness.
After their initial title fight was scrapped from this month’s UFC 106 card, an expected re-booking at UFC 108 between heavyweight champion Brock Lesnar (4-1 MMA, 3-1 UFC) and challenger Shane Carwin (11-0 MMA, 3-0 UFC) also appears dead.

Heavy.com was the first to report Lesnar’s withdrawal, and according to Carwin, he’s been notified Lesnar is suffering from mononucleosis and their UFC 108 bout is “not happening.”

“Brock has mono, and what the UFC has told me is that I have earned the title [shot] but I have to wait for the title holder,” he wrote on shane-carwin.com. “I hope Brock gets well soon.”

Carwin’s manager, Jason Genet, confirmed with MMAjunkie.com (www.mmajunkie.com) late Wednesday that updates had been trickling in that made the fight seem unlikely.

In an earlier blog posted last week, Carwin announced that Lesnar was sick and out of their UFC 106 booking, which was slated for Nov. 21 at the Mandalay Bay Events Center in Las Vegas. (Carwin also claimed he had H1N1 but had opted not to pull out of the fight.)

The fight was then expected to be announced for UFC 108 on Jan. 2 at the MGM Grand Garden Arena in Las Vegas. However, a potential match-up between top contenders Cain Velasquez and Antonio Rodrigo Nogueira, which MMAjunkie.com reported on Wednesday (as likely but not signed), is now the leading candidate to headline that show.

The scrapped main event was supposed to serve as Lesnar’s first title defense since unifying the UFC’s heavyweight belts with a UFC 100 victory over then-interim champ Frank Mir. Lesnar won the title with a November 2008 victory over then-champ Randy Couture.

Carwin, meanwhile, looked to claim his 12th straight win at UFC 106. The 34-year-old has yet to fight longer than two minutes and 11 seconds in any bout. He had posted swift UFC victories over Christian Wellisch, Neil Wain and Gabriel Gonzaga to earn the title shot.

There is currently no target date for the matchup, and Carwin told MMAjunkie.com he’s remaining positive despite the financial strain caused by not fighting since March – and the challenger even offered a tip to aid Lesnar in his recovery.

“I am honored to be considered the contender, and I will wait for however long it takes to fight a healthy Brock Lesnar,” Carwin said. “I would suggest that he visits a Max Muscle Sports Nutrition near him as they have been a key to keeping me healthy and moving forward.

“I am thankful to my fans and my sponsors at Beaver Buzz Energy, Max Muscle, PerformanceMMA and Warrior Wear who have supported me and stood by my side. The financial and emotional support they provide me and my family has helped me more then they may ever know.”

Looks like we are going to have to wait a bit before we see Brock Lesnar in the octagon agian.