WEC 37: Torres vs. Tapia was a mixed martial arts event held by World Extreme Cagefighting on December 3, 2008 at the Hard Rock Hotel and Casino in Las Vegas, Nevada. The event aired live on the Versus Network. WEC Bantamweight Champion Miguel Torres successfully defended his title again against Manny Tapia in the main event of the evening. In addition, former IFL standout Wagnney Fabiano made his WEC debut on this card. The Mark Munoz-Ricardo Barros fight was the final light heavyweight bout to be put on by the WEC. The division was absorbed into the UFC following this event. The event drew an estimated 671,000 viewers on Versus.

WEC 40: Torres vs. Mizugaki was a mixed martial arts event held by World Extreme Cagefighting on April 5, 2009 at the UIC Pavilion in Chicago, Illinois. The event aired live on the Versus Network.

WEC 43: Cerrone vs. Henderson was a mixed martial arts event held by World Extreme Cagefighting on October 10, 2009 at the AT&T Center in San Antonio, Texas. The best light weight fighters in the world will be on display when WEC invades the Covelli Centre in Youngstown, OH. In the main event, fan favorite Donald “Cowboy” Cerrone battles feared striker Ben Henderson in a bout that will crown the interim WEC lightweight champion.

WEC 27: Marshall vs. McElfresh was the third mixed martial arts event held by the World Extreme Cagefighting under Zuffa management. The event was held on May 12, 2007. UFC lightweight fighter and future WEC Lightweight Champion Jamie Varner was expected to make his promotional debut on this card against Richard Crunkilton, but the fight was removed from the card after Varner suffered training injuries.

KOTC 37: Unfinished Business was an event held on June 12, 2004 at the Soboba Casino in San Jacinto, California, United States.

WEC 32: New Mexico was a mixed martial arts (MMA) event held by World Extreme Cagefighting (WEC) that took place on Wednesday, February 13, 2008. For the first time under Zuffa ownership, the show was held in Rio Rancho, New Mexico and not the usual spot of Las Vegas, Nevada. The event drew an estimated 268,000 viewers on Versus, a record low for the WEC.