Kevin Iole has the story:
UFC president Dana White confirmed the news to Yahoo! Sports. White said Lesnar has been ill for more than three-and-a-half weeks and unable to train. With the bout at UFC 106 less than a month away, Lesnar was forced to postpone the title defense.
"He said he's never been this sick in his life," White said. "He said it's been going on for a long time and he just hasn't been able to shake it."
Dana White is having a terrible autumn. Between Rampage Jackson walking out on UFC 107, the ugly outcome of the UFC 104 headliner, and this it really looks like someone's voodoo curse on the UFC has taken hold.
That or the UFC would rather save Lesnar vs Carwin for their New Year's Eve card.