According to InsideFighting.com:
Heavyweight Mark Burch (10-2-0) has pulled out of UFC 92: The Ultimate 2008. The reason for the withdrawal has not yet been reported. The heavyweight was set to take on Antoni Hardonk (7-4) at the December 27th event.
(8-1) heavyweight prospect Mike “The Juggernaut” Wessel is signed to replace at UFC 92 on the 27th of December.
From the UG:
Wessel was an assistant Strength and Conditioning Coach at the University of Arkansas. He started getting the itch to compete again and decided to try kickboxing and then MMA. He did his first MMA fight on 3 days training and KO’d an opponent with 10 ammy fights. Mike is 8-1 as a pro and avenged his only loss.
Its short notice but he’s ready and it should be a great fight