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UFC Ultimate Fighter 1 Finalist Stephan Bonnar has announced his retirement from MMA, following a UFC 153 loss to Anderson Silva. Bonnar was involved in arguably the most important fight in UFC history, a decision loss to Forrest Griffin at the UFC Ultimate Fighter Finale. Throughout his ten year career as a professional MMA fighter, Bonnar has fought the likes of Forrest Griffin, Brian Ebersole, Terry Martin, Lyoto Machida, Keith Jardine, Rashad Evans, Jon Jones, Mark Coleman, Krzysztof Soszynski and Anderson Silva.
