War Machine will fight for the MMA Big Show welterweight title against Roger Bowling, while Scarola will take on Joe Ammerman for the lightweight title.
War Machine (7-2) stepped in on short notice last month and submitted Guillaume Delorenzi via rear-naked choke in the first round. He is riding a two-fight winning streak since leaving the UFC on a loss to Yoshiyuki Yoshida at UFC 84 in May 2008.
Scarola (4-1) will be fighting for the first time since appearing on "The Ultimate Fighter 6: Hughes vs. Serra," which aired September 2007. His last fight was an armbar submission win in November 2006. He has won all his fights by submission in the first round.