From wiki
UFC 146: Dos Santos vs. Mir is an upcoming mixed martial arts event to be held by Ultimate Fighting Championship. It is expected to take place on May 26, 2012 at the MGM Grand Garden Arena in Las Vegas, Nevada.[1]
For the first time in UFC history all 4 fights on the main card will be Heavyweight bouts.[2] UFC Primetime will return to promote the main event.[3]
On April 4th, 2012 it was announced that co-headliner Alistair Overeem had failed a pre-fight drug test due to a high testosterone to epitestosterone ratio. Overeem will have to appear at a Nevada State Athletic Commission hearing on April 24th in order to review his request for a license.[4]
On April 20, 2012 Dana White announced via Twitter that Junior dos Santos will face Frank Mir instead of Alistair Overeem.[5] Two days later Dana White announced via Twitter that Cain Velasquez, who was originally slated to fight Mir in the co-main event, will now face Antonio Silva.[6] Roy Nelson, who was originally scheduled to fight Silva, will remain on the card and face Gabriel Gonzaga.[7]
Main card
Heavyweight Championship: Junior dos Santos (c) vs. Frank Mir[1]
Heavyweight bout: Cain Velasquez vs. Antonio Silva[1]
Heavyweight bout: Roy Nelson vs. Gabriel Gonzaga[1]
Heavyweight bout: Mark Hunt vs. Stefan Struve[1]
Preliminary card (FX)
Featherweight bout: Diego Brandao vs. Darren Elkins[1]
Lightweight bout: Evan Dunham vs. Edson Barboza[1]
Middleweight bout: Jason Miller vs. C.B. Dollaway[1]
Lightweight bout: Jacob Volkmann vs Paul Sass[1]
Preliminary card (Facebook)
Welterweight bout: Dan Hardy vs. Duane Ludwig[1]
Light Heavyweight bout: Kyle Kingsbury vs. Glover Teixeira[1]
Featherweight bout: Mike Brown vs. Daniel Pineda[1]