UFC 44: Undisputed was a mixed martial arts event held by the Ultimate Fighting Championship at the Mandalay Bay Events Center on the Las Vegas Strip in Paradise, Nevada. Headlining the card was a light heavyweight championship unification bout between Tito Ortiz and Randy Couture.

UFC 101: Declaration was a mixed martial arts pay-per-view event held by the Ultimate Fighting Championship (UFC) on August 8, 2009 in Philadelphia, Pennsylvania. It was the first UFC event held in Philadelphia. The event featured the second title defense of Lightweight Champion BJ Penn against Kenny Florian, and a non-title Light Heavyweight bout for Middleweight Champion Anderson Silva against former Light Heavyweight Champion Forrest Griffin.

UFC 47: It's On! was a mixed martial arts event held by the Ultimate Fighting Championship at the Mandalay Bay Events Center in Las Vegas, Nevada. The title "It's On!" refers to Chuck Liddell and Tito Ortiz' long running negotiations leading up to the fight.

UFC 52: Couture vs. Liddell 2 was a mixed martial arts event held by the Ultimate Fighting Championship on April 16, 2005, at the MGM Grand Arena in Las Vegas, Nevada. The event was broadcast live on pay-per-view in the United States and Canada, and later released on DVD.

UFC 43: Meltdown was a mixed martial arts event held by the Ultimate Fighting Championship on June 6, 2003, at the Thomas and Mack Center in Las Vegas, Nevada. Headlining the card was the Interim Light Heavyweight Championship match between Randy Couture and Chuck Liddell.

UFC 49: Unfinished Business was a mixed martial arts event held by the Ultimate Fighting Championship at the MGM Grand Arena in Las Vegas, Nevada. It featured the anticipated rubber match between Light Heavyweight Champion Vitor Belfort and Randy Couture, following a disappointing doctor's stoppage in their last encounter at UFC 46.

UFC 50: The War of '04 was a mixed martial arts event held by the Ultimate Fighting Championship at the Trump Plaza in Atlantic City, New Jersey. Headlining the card were Tito Ortiz and Patrick Côté. Côté was a late replacement for Lion's Den fighter Guy Mezger, who pulled out of the event due to a medical condition. It also featured the Middleweight debut of future champion Rich Franklin.

UFC 51: Super Saturday was a mixed martial arts event held by the Ultimate Fighting Championship on February 5, 2005 (Super Bowl weekend) at the Mandalay Bay Events Center in Las Vegas, Nevada.

UFC 7: The Brawl in Buffalo was a mixed martial arts event held by the Ultimate Fighting Championship on September 8, 1995, at the Memorial Auditorium in Buffalo, New York. The event was seen live on pay per view in the United States, and later released on home video.

UFC 6: Clash of the Titans was the sixth mixed martial arts event held by the Ultimate Fighting Championship on July 14, 1995, at the Casper Events Center in Casper, Wyoming. The event was seen live on pay per view in the United States, and later released on home video.

UFC 95: Sanchez vs. Stevenson was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on February 21, 2009, at The O2 Arena in London, United Kingdom. The main event was a lightweight match-up between Diego Sanchez vs. Joe Stevenson.

UFC 45: Revolution was a mixed martial arts event held by the Ultimate Fighting Championship at the Mohegan Sun Casino in Uncasville, Connecticut. This event marked the 10th anniversary of the UFC and to celebrate the anniversary the UFC inaugurated its Hall of Fame, with Royce Gracie and Ken Shamrock as the first inductees.

UFC 98: Evans vs. Machida was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on May 23, 2009 in Las Vegas, Nevada. Quinton Jackson, former UFC Light Heavyweight champion, was to fight the undefeated current champion Rashad Evans but had to undergo arthroscopic surgery to repair ligament damage in his jaw that he received in a previous training camp. Instead, Evans headlined the card against fellow undefeated contender Lyoto Machida.

UFC 102: Couture vs. Nogueira was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on August 29, 2009 at the Rose Garden in Portland, Oregon. It featured former UFC Heavyweight and Light Heavyweight champion, Randy Couture, facing off against former PRIDE Heavyweight champion and former UFC Interim Heavyweight champion, Antonio Rodrigo Nogueira.

UFC 94: St-Pierre vs. Penn 2 was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on January 31, 2009. The main event featured the rematch of the UFC Welterweight Champion Georges St-Pierre against the UFC Lightweight Champion BJ Penn for the UFC Welterweight Championship.

UFC 99: The Comeback was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on June 13, 2009 in Cologne, Germany. It was the first UFC event held in Germany, as well as the first in mainland Europe (events have previously been held in both the U.K. and Ireland). The main event was a catch weight bout between Rick Franklin vs Wanderlei Silva.

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.

UFC Fight Night 18: Condit vs. Kampmann was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on April 1, 2009. The event was broadcast on Spike TV, as a prelude to the premiere of The Ultimate Fighter: United States vs. United Kingdom. The main event featured the debut of former WEC Welterweight Champion Carlos Condit – riding an eight fight win streak – in the main event against Martin Kampmann.

WEC 39: Brown vs. Garcia Took place on March 1, 2009 in Corpus Christi, Texas. The event aired live on the Versus Network.WEC Featherweight Champion Mike Brown made his first title defense against number one contender Leonard Garcia.

World Extreme Cagefighting returned to The Palace Indian Gaming Center in Lemoore, California for the ninth installment of promoters Scott Adams' and Reed Harris' emerging event. With a few big name guys and a packed stable of home grown talent, the WEC has started to make a push towards the top of the pack when it comes to regional events.