Nick Diaz vs Carlos Condit staredown pic from UFC 143 press conference

The Ultimate Fighting Championship (UFC) 143 pre-fight press conference is in the books for the "Diaz vs. Condit" pay-per-view (PPV) event scheduled for the Mandalay Bay Events Center in Las Vegas, Nevada, on Sat., Feb. 4, 2012.

With a name like that, it should come as no surprise that former Strikeforce Welterweight Champion Nick Diaz is taking on ex WEC 170-pound titleholder Carlos Condit in the night's main event. As with every press conference, they face off at the end and try to psyche each other out.

Not sure anyone can out-mug Diaz, but "The Natural Born Killer" sure gives it his best shot.

Also squaring off were main card fighters Josh Koscheck and Mike Pierce as well as Roy Nelson and Fabricio Werdum. Their staredown pics can be found after the jump.

Have a look.

Josh Koscheck vs. Mike Pierce.

Roy Nelson vs. Fabricio Werdum

For all the news and notes from today's UFC 143 pre-fight press conference click here.