Ryan Bader and Efrain Escudero will be downloadable characters available exclusively for Gamestop customers.
For those wondering, Jon Fitch, who was released last November by the UFC partially due to likeness rights for video games and then re-signed the next day, will appear in the game.
Fighters will parantheses next to them can switch to that weight division.
"UFC Undisputed 2009" is slated to be released May 19 for the Xbox 360 and Playstation 3.
Heavyweights: Antonio Rodrigo Nogueira, Brock Lesnar, Frank Mir, Brandon Vera (LH), Gabriel Gonzaga, Cain Velasquez, Cheick Kongo, Eddie Sanchez, Heath Herring, Andrei Arlovski, Mirko "Cro Cop" Filipovic, Fabricio Werdum, Tim Sylvia, Mark Coleman, Antoni Hardonk and Justin McCully.
Light-Heavyweights: Chuck Liddell, Quinton "Rampage" Jackson, Forrest Griffin, Tito Ortiz, Keith Jardine, Wanderlei Silva, Mauricio "Shogun" Rua, Lyoto Machida, Rashad Evans, Stephan Bonnar, James Irvin, Wilson Gouveia (MW), Houston Alexander, Kazuhiro Nakamura, Thiago Silva, Tim Boetsch, Ryan Bader (Gamestop).
Middleweights: Anderson Silva (LH), Rich Franklin (LH), Dan Henderson (LH), Michael Bisping (LH), Kendall Grove, Chris Leben, Jason MacDonald, Nate Marquardt, Drew McFedries, Ricardo Almeida, Evan Tanner, Yushin Okami, Demian Maia, Martin Kampmann (WW), Amir Sadollah (WW) and Thales Leites.
Welterweights: Georges St-Pierre, Matt Hughes, Matt Sera (LW), Jon Fitch, Karo Parisyan, Josh Koscheck, Diego Sanchez, Mike Swick (MW), Marcus Davis, Thiago Alves, Chris Lytle, Ben Saunders, Josh Burkman, Kyle Bradley, Matt Arroyo and Anthony Johnson.
Lightweights: BJ Penn (WW), Sean Sherk (WW), Kenny Florian, Roger Huerta, Joe Stevenson, Mac Danzig, Nathan Diaz, Spencer Fisher, Tyson Griffin, Gray Maynard, Thiago Tavares, Joe Lauzon, Rich Clementi, Mark Bocek, Hermes Franca, Frank Edgar and Efrain Escudero (Gamestop).