UFC 27: Ultimate Bad Boyz was a mixed martial arts event held by the Ultimate Fighting Championship on September 22, 2000 at Lake Front Arena in New Orleans, Louisiana.

UFC 41: Onslaught was a mixed martial arts event held by the Ultimate Fighting Championship at the Boardwalk Hall in Atlantic City, New Jersey. UFC 41 featured two championship bouts, a Heavyweight Championship Bout between Ricco Rodriguez and Tim Sylvia, and a Lightweight Championship Bout between BJ Penn and Caol Uno. The event also marked the return of Tank Abbott to the UFC