premise: Nate Diaz only ever competed in America.
hypothesis: Joseph Edward Lauzon Jr. ( born May 22 , 1984 ) is an American mixed martial artist competing in the UFC 's Lightweight division . Nathan Donald `` Nate '' Diaz ( born April 16 , 1985 ) is an American professional mixed martial artist currently competing for the Ultimate Fighting Championship ( UFC ) . He was the winner of The Ultimate Fighter 5 . Prior to signing with the UFC , Diaz competed in World Extreme Cagefighting , Strikeforce , and Pancrase . Nicholas Robert `` Nick '' Diaz ( born August 2 , 1983 ) is an American professional mixed martial artist who is currently signed with the Ultimate Fighting Championship ( UFC ) .