UFC 155 is set to take place from the MGM Grand Garden Arena in Las Vegas, NV on December 29. In the main event UFC heavyweight champion Junior dos Santos will rematch former champ Cain Velasquez.
Moraga (pictured) is currently riding a five-fight win streak including his UFC debut knockout win over Ulysses Gomez.
Cariaso last saw action in his flyweight debut with a division win over Josh Ferguson at UFC on FUEL TV 4. The former bantamweight posted notable wins under the UFC banner over Vaughan Lee and Takeya Mizugaki before dropping down a division.
The UFC 155 card now includes:
Champ Junior Dos Santos vs. Cain Velasquez – for heavyweight title
Phil Davis vs. Forrest Griffin
Tim Boetsch vs. Constantinos Philippou
Joe Lauzon vs. Jim Miller
Alan Belcher vs. Yushin Okami
Chris Leben vs. Karlos Vemola
Brad Pickett vs. Eddie Wineland
Phil De Fries vs. Todd Duffee
Michael Johnson vs. Myles Jury
Leonard Garcia vs. Cody McKenzie
Byron Bloodworth vs. Erik Perez
Chris Cariaso vs. John Moraga