UFC 16 was an MMA event held by the UFC on March 13, 1998 in New Orleans, Louisiana, live on pay per view in the USA and later released on home video. It featured the first UFC Lightweight tournament, a Middlteweight Championship bout, a Heavyweight and a Middleweight Superfight.

UFC 18: The Road to the Heavyweight Title was a mixed martial arts event held by the Ultimate Fighting Championship on January 8, 1999 in New Orleans, Louisiana. The event was seen live on pay per view in the United States, and later released on home video.

UFC 20: Battle for the Gold was a mixed martial arts event held by the Ultimate Fighting Championship on May 7, 1999 at the Boutwell Auditorium in Birmingham, Alabama. The event was seen live on pay per view in the United States, and later released on home video.

UFC 25: Ultimate Japan 3 was a mixed martial arts event held by the Ultimate Fighting Championship on April 14, 2000 at the Yoyogi National Gymnasium in Tokyo, Japan.

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.