Frank Shamrock and Igor Zinoviev battle for the light heavyweight championship and Pat Miletich makes his debut in the Octagon as the UFC holds its first ever lightweight tournament.

UFC 17.5: Ultimate Brazil was the UFC's first trip to Brazil and featured Frank Shamrock vs. John Lober, Pat Miletich vs. Mikey Burnett, Vitor Belfort vs. Wanderlei Silva, Pedro Rizzo vs. Tank Abbott, Tsuyoshi Kosaka vs. Pete Williams, and Ebenezer Fontes Braga vs. Jeremy Horn.