List of World Extreme Cagefighting champions

In December 2006 World Extreme Cagefighting was bought by Zuffa, LLC, the parent company of the UFC, to concentrate on the four smaller weight classes under the Unified Rules of Mixed Martial Arts.

By the time of the WEC's absorption into the UFC at the end of 2010, the only remaining weight divisions were Lightweight, Featherweight and Bantamweight.

Richard Crunkilton at WEC 30 on Sep 5, 2007 in Las Vegas, NV, USA 1. def.

Donald Cerrone at WEC 38 on Jan 25, 2009 in San Diego, CA, USA 1. def.

Dominick Cruz at WEC 26 on Mar 24, 2007 in Las Vegas, NV, USA 3. def.

Jeff Curran at WEC 31 on Dec 12, 2007 in Las Vegas, NV, USA 5. def.

Leonard Garcia at WEC 39 on Mar 1, 2009 in Corpus Christi, TX, USA 2. def.