List of World Extreme Cagefighting champions

This is a list of World Extreme Cagefighting (WEC) champions at each weight class.

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. Over the next two years, the WEC would phase out weight classes above 155 lbs, with most of the fighters going to the UFC. 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.

1. def. Ricco Rodriguez at WEC 16 on Aug 18, 2005 in Lemoore, CA, USA

1. def. Doug Marshall at WEC 15 on May 19, 2005 in Lemoore, CA, USA

1. def. Mike Kyle at WEC 20 on May 5, 2006 in Lemoore, CA, USA

1. def. Justin Levens at WEC 18 on Jan 13, 2006 in Lemoore, CA, USA

1. def. Justin McElfresh at WEC 27 on May 12, 2007 in Las Vegas, NV, USA
2. def. Ariel Gandulla at WEC 31 on Dec 12, 2007 in Las Vegas, NV, USA

1. def. Chael Sonnen at WEC 31 on Dec 12, 2007 in Las Vegas, NV, USA

1. def. Shonie Carter at WEC 18 on Jan 13, 2006 in Lemoore, CA, USA

1. def. Brock Larson at WEC 29 on Aug 5, 2007 in Las Vegas, NV, USA
2. def. Carlo Prater at WEC 32 on Feb 13, 2008 in Albuquerque, NM, USA
3. def. Hiromitsu Miura at WEC 35 on Aug 3, 2008 in Las Vegas, NV, USA

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