Brock Lesnar isn't really sick. He's afraid to fight Shane Carwin. The UFC wanted to move Lesnar-Carwin to UFC 108 on Jan. 2 to ensure that card does well.

Fellow heavyweight Frank Mir has heard all of the internet blather about Lesnar's cancellation of his Nov. 21 fight against Carwin. Mir doesn't know what to believe but he did tell Cagewriter that getting sick during training is almost a rite of passage:

"It happens to a lot of us. You're training so hard that your immune system takes a sap. I don't think I've ever not gotten sick for three or four days. You have to be disciplined enough to take time off."

Lesnar decided to bail completely from the Nov. 21 fight. The rescheduled tilt may or may not be on Jan. 2 at UFC 108. No official word has come from the UFC.

Mir said he and his wife Jennifer were discussing the hypothetical notion of filling in for Lesnar and taking on Carwin in less than a month. The former champ said there's no way he'd take someone like Carwin on short notice. The same goes for about six other heavyweights that he wouldn't step up against without a full training camp.

At the end of the interview, Mir discusses two of the UFC's young guns, Cain Velasquez and Todd Duffee. He addresses some the final questions on Velasquez and said he's super impressed with Duffee, who he's had a chance to roll with now that the 23-year-old is training in Las Vegas.