UFC 55: Fury was a mixed martial arts event held by the Ultimate Fighting Championship on October 7, 2005 at the Mohegan Sun Arena in Uncasville, Connecticut. UFC heavyweight champion Andrei Arlovoski defends his title against hard-hitting Mexican striker Paul Buentello. The undercard is highlighted by The Ultimate Fighter Season 1 winner Forrest Griffin as he takes on Australia's Elvis Sinosic.

Strikeforce Challengers: Villasenor vs. Cyborg was a mixed martial arts event held by Strikeforce. The second Challengers episode took place on June 19, 2009 at the ShoWare Center at Kent, Washington.

UFC 29: Defense of the Belts was a mixed martial arts event held by the Ultimate Fighting Championship on December 16, 2000 at Differ Ariake Arena in Tokyo, Japan.

UFC 33: Victory in Vegas was a mixed martial arts event held by the Ultimate Fighting Championship at the Mandalay Bay Events Center on the Las Vegas Strip in Las Vegas, Nevada on September 28, 2001. The event was seen live on pay per view in the United States, and later released on home video.

UFC 48: Payback was a mixed martial arts event held by the Ultimate Fighting Championship at the Mandalay Bay Events Center in Las Vegas, Nevada. The featured contestants of the evening were Ken Shamrock and Kimo Leopoldo, who had met once before in 1996 at UFC 8, with Shamrock reigning victorious.

Strikeforce: Four Men Enter, One Man Survives was a mixed martial arts event held at the HP Pavilion in San Jose, California on November 16, 2007. The event was hosted by Strikeforce in conjunction with bodogFight, and was streamed live on Yahoo! Sports. The event held two distinctions in that: 1) it contained the first MMA tournament sanctioned by the California State Athletic Commission and 2) Strikeforce's heavyweight champion was determined during the event in a non-tournament fight.

UFC 133: Evans vs. Ortiz was a mixed martial arts event held by the Ultimate Fighting Championship on August 6, 2011 at the Wells Fargo Center in Philadelphia, Pennsylvania.

UFC 140: Jones vs. Machida was a mixed martial arts event held by the Ultimate Fighting Championship on December 10, 2011 at the Air Canada Centre in Toronto, Ontario, Canada. In the main event, Lyoto Machida also suffered his first submission loss at the hands of Jon Jones. In doing so, Jones retained the UFC Light Heavyweight Championship title.

World Series of Fighting 11 is headlined by a lightweight championship bout with the exciting Justin Gaethje (11-0) putting his belt on the line against the extremely tough and talented Notorious Nick Newell (11-0). Also on the card, a highly anticipated welterweight rubber match takes place as we see Brazilian jiu-jitsu black belt Jon Fitch (25-6-1, 1 NC) take on Josh The People's Warrior Burkman (27-10). Both Fitch and Burkman boast a win over each other, so this bout is for bragging rights.

Submission Underground 8 took place Sunday, May 12, 2019 with 6 fights at Roseland Theater in Portland, Oregon.