After a 15-fight career, including his past four in the UFC, 33-year-old light heavyweight  Cody Donovan is retiring from MMA. The Coloradan, a product of Grudge Training Center near Denver, made the announcement Tuesday on his official website . Donovan (8-5 MMA, 1-3 UFC), has dropped three straight fights, all by knockout or TKO. “After much thought and discussion with my coaches and wife, we decided it is time to close this chapter of my life,” Donovan stated in his announcement.