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.

WEC 21: Tapout was a mixed martial arts event held on June 15, 2006. WEC 21's main event was a fight between Rob McCullough and Ryan Healy.

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 53: Heavy Hitters was a mixed martial arts event held by the Ultimate Fighting Championship on June 4, 2005, at the Boardwalk Hall in Atlantic City, New Jersey. Andrei Arlovski puts his interim Heavyweight Championship on the line against Justin Eilers. The undercard features a rematch for the UFC Middleweight Championship as Champion Evan Tanner defends this title against Rich Franklin. Other featured fighters include top ranked Forrest Griffin, Paul Buentello, Nate Quarry, David Loiseau, Nick Diaz and more.

UFC 57: Liddell vs. Couture 3 was a mixed martial arts event held by the Ultimate Fighting Championship on February 4, 2006. It was held at the Mandalay Bay Events Center on the Las Vegas Strip in Nevada, and broadcasted live on pay-per-view in the United States. Headlining were top UFC stars and former coaches of The Ultimate Fighter Chuck Liddell and Randy Couture.

EliteXC: Unfinished Business was a mixed martial arts event held by EliteXC on July 26, 2008 in Stockton, CA at Stockton Arena. The main event featured a rematch between Middleweight Champion Robbie Lawler and Scott Smith. This event was the second EliteXC event to air on CBS.

WEC 24: Full Force was a mixed martial arts event held on October 12, 2006. WEC 24's main event was a championship fight for the WEC Lightweight Title between champion Hermes Franca and challenger Nate Diaz.