won the fight via KO by a body blow. Guillard next fought Joe Stevenson in the main event of UFC Fight Night 9 and submitted to a guillotine choke 27 seconds into the fight, after being stunned by a punch. Guillard also submitted in his next fight, against Rich Clementi at UFC 79, to a rear naked choke at 4:40 of the first round. Before and after the bout, the fighters talked trash. Guillard gave Clementi the finger during the introductions and attempted to attack him after the fight, but was restrained by referee Herb Dean. He was subsequently released from the UFC, but was brought back after a win in a minor promotion. Guillard returned to the UFC at UFC 86, knocking out Dennis Siver in 36 seconds and earning a Knockout of the Night bonus. He was slated to fight Spencer Fisher at UFC 90, but tore his ACL while training and was replaced by Shannon Gugerty. Guillard next won a split decision over Gleison Tibau at The Ultimate Fighter: United States vs. United Kingdom Finale on June 20, 2009. Guillard submitted to a guillotine choke by Nate Diaz on September 16, at UFC Fight Night: Diaz vs. Guillard. On February 6, 2010, Guillard faced Ronys Torres at UFC 109. He joined coach Greg Jackson's camp in Albuquerque, New Mexico to prepare for the fight. He showed improved submission defense and patience in the fight, winning a close unanimous decision (29-28, 29-28, 29-28). Guillard was scheduled to face Thiago Tavares at UFC 114, but Tavares was forced off the card with an elbow injury. Guillard instead fought and knocked out UFC newcomer Waylon Lowe in the first round. On September 25, 2010, Guillard won a split decision over Jeremy Stephens at UFC 119. Guillard was expected to face Yves Edwards on January 22, 2011, at UFC Fight Night 23. However, headliner Kenny Florian pulled out of his fight with Evan Dunham due to injury and Guillard replaced him. He defeated Dunham in the first round via TKO by knees. The finish earned him the Knockout of the Night award. Guillard next defeated Shane Roller via first-round KO on July 2, 2011 at UFC 132. Guillard faced Joe Lauzon on October 6, 2011 at UFC 136. Guillard was quickly submitted with a rear naked choke after being stunned by a counter left hook from Lauzon. Guillard next faced Jim