Ultimate Fighting Championship (UFC) is just over two weeks away from kicking off its super-sized heavyweight pay-per-view (PPV) main card, scheduled for the MGM Grand Garden Casino in Las Vegas, Nevada on May 26, 2012.

UFC 146: "Dos Santos vs. Mir" will feature hard-hitting heavyweight champion Junior dos Santos putting his 265-pound title on the line against former division champion and late replacement Frank Mir, who steps in on short notice for the ousted Alistair Overeem.

Also in action, former titleholder Cain Velasquez tries to reposition himself for another crack at the crown by taking on Brazilian roadblock Antonio Silva, who was recently imported from Strikeforce to shake things up in the 265-pound division.

Get an in-depth look at both "Sin City" match-ups in the recently released UFC 146 video preview above, then head on over to our "Dos Santos vs. Mir" news archive here to sort through the rest of the fight card and line-up, which you can also see by clicking here.