Season 1 of The Contender premiered on March 7, 2005.

Season 2 of The Contender premiered on July 18, 2006.

Season 3 of The Contender premiered on September 4, 2007.

Season 4 of The Contender premiered on December 3, 2008.

Season 5 of The Contender premiered on August 24, 2018.