MMAJunkie.com has the scoop:
Griffin, whose fight with Ortiz eventually was promoted to the night's main event when Brock Lesnar's illness forced a cancellation of his would-be headliner with Shane Carwin, discussed the series of events with MMAjunkie.com (www.mmajunkie.com) on a recent media conference call.
“I was coming down from the mountains from my honeymoon, and [White] said, 'Let's fight Tito,'” Griffin said. “And I said, 'Let's do it Dec. 12 (at UFC 107). Give me a little more time.' And they called me back the next day and said it's Nov. 21, and I said, 'OK, that's fine. Let's do it.'
“So yeah, I cut my honeymoon short and just drove back and started training right then.”
The former UFC light heavyweight champion and longtime fan favorite hasn't competed since a devastating and embarrassing loss to Anderson Silva at UFC 101 in August. Silva, the UFC's current middleweight champ, moved up a weight class for the fight and thrashed his opponent with multiple knockdowns and an eventual first-round knockout.

