The UFC has promoted a welterweight bout between Paulo Thiago (11-1) and Jacob Volkmann (10-0) to the main card of this weekends UFC 106 event in Las Vegas this Saturday.

The bout was moved up from the un-aired preliminary card after a last minute withdrawal by Karo Parisyan who had been scheduled to face Dustin Hazelett on the ppv portion of the event. Rumors have surrounded the reason for Parisyan’s withdrawal, but it appears he took himself out of the event because of an addiction problem.

UFC 106 takes place Nov. 21 at the Mandalay Bay Events Center in Las Vegas. Two bouts from the preliminary card will air live on Spike TV at 9 p.m. ET (6 p.m. PT) featuring matches between Marcus Davis vs. Ben Saunders and Kendall Grove vs. Jake Rosholt. The pay-per-view will air at 10 p.m. ET.

The official UFC 106 card now includes:

MAIN CARD

- Forrest Griffin vs. Tito Ortiz
- Anthony Johnson vs. Josh Koscheck
- Phil Baroni vs. Amir Sadollah
- Luiz Cane vs. Antonio Rogerio Nogueira
- Paulo Thiago vs. Jacob Volkmann

PRELIMINARY CARD (Spike TV)

- Marcus Davis vs. Ben Saunders
- Kendall Grove vs. Jake Rosholt

PRELIMINARY CARD (un-aired)

- Brian Foster vs. Brock Larson
- Jason Dent vs. George Sotiropoulos