Guillotine specialist Cody McKenzie (12-2) has been scratched from the undercard of UFC on FOX 2 after suffering an undisclosed injury in training camp.
WEC veteran Shane Roller (10-5) has been tapped as a replacement for a lightweight tilt against "The Ultimate Fighter 12" runner-up Michael Johnson (9-6). UFC officials confirmed the switch on Friday.
A 32-year-old former Division I wrestler, Roller may be fighting for his job after being finished in consecutive contests against T.J. Grant and Melvin Guillard. Previously the Team Takedown product earned "Knockout of the Night" honors for a second-round KO of Thiago Tavares in his UFC debut.
Meanwhile, Johnson, a 25-year-old knockout artist from Missouri, has undergone his own Octagon struggles. Following the conclusion of the TUF 12, "The Menace" sandwiched a TKO victory over Eddie Faaloloto between tough losses to TUF 12 winner Jonathan Brookins and British submission ace Paul Sass.
UFC on Fox 2 takes place January 28, 2012 at the United Center in Chicago, Illinois. Three high-profile contender matches headline the network broadcast -- Rashad Evans vs. Phil Davis, Mark Munoz vs. Chael Sonnen, and Michael Bisping vs. Demian Maia.
UFC on Fox 2 fight card:
Main card:
Light heavyweight: Rashad Evans vs. Phil Davis
Middleweight: Chael Sonnen vs. Mark Munoz
Middleweight: Michael Bisping vs. Demian Maia
Preliminary card (Fuel TV):
Bantamweight: Johnny Bedford vs. Mitch Gagnon
Lightweight: Evan Dunham vs. Nik Lentz
Heavyweight: John Olav Einemo vs. Mike Russow
Lightweight: Michael Johnson vs. Shane Roller
Featherweight: George Roop vs. Cub Swanson
Featherweight: Charles Oliveira vs. Eric Wisely
Middleweight: Chris Camozzi vs. Dustin Jacoby
Heavyweight: Lavar Johnson vs. Joey Beltran