Ultimate Fighter (TUF) 12 alum Michael Johnson has been paired up against Shane Roller for a 155-pound scrap at the UFC on FOX 2 event scheduled for Jan. 28, 2012, at the United Center in Chicago, Illinois.

Roller replaces Johnson's original opponent, Cody McKenzie, who was forced to bow out of the upcoming contest due to injury.

After making his UFC debut with a knockout win over Thiago Tavares, Roller (10-5) dropped back-to-back fights to Melvin Guillard (knockout) and T.J. Grant (submission).

The World Extreme Cagefighting (WEC) veteran is likely in a do-or-die situation from a contractual standpoint, as three straight losses never bodes well for up-and-coming fighters.

Will Johnson send him to the unemployment line?

Like Roller, "The Menace" is 1-2 inside the Octagon, wrapping a pair of losses to Jonathan Brookins and Paul Sass around a UFC on Versus 4 stoppage over Edward Faaloloto.

And also like his opponent, the Jan. 28 fight could be for all the marbles.

UFC on Fox 2, which will mark the promotion's second appearance on network television, will be headlined by a light heavyweight number one contender bout, as Rashad Evans and Phil Davis return from injury to battle for the right to fight Jon Jones.

Also booked for the FOX fight card is a middleweight title eliminator pitting former championship challenger Chael Sonnen against streaking 185-pound wrecking ball Mark Munoz.

For the latest UFC on FOX 2 news and notes check out our event archive right here.