The Biggest Loser Anna Kournikova exiting 'The Biggest Loser' after only single season 11/14/2011 Anna Kournikova's The Biggest Loser training job will be ending after a single season. Read More RELATED NEWS NBC reveals identities of thirteenth-season 'The Biggest Loser' cast'The Biggest Loser' crowns John Rhode twelfth-season champion'The Biggest Loser' reveals finale finalists, cuts Vinny and Becky TAGS: The Biggest Loser Bob Harper Anna Kournikova
