top position, the doctors were forced to pull Edwards from the match. Stevenson returned to the Octagon at UFC 65, defeating Japanese fighter Dokonjonosuke Mishima by guillotine choke in the first round. Next, Stevenson was booked for the main event at UFC Fight Night 9 against fellow Season 2 contestant Melvin Guillard. Despite a war of words between the two fighters, particularly by Guillard leading up to the bout, Stevenson made quick work of his opponent, knocking down Guillard with a punch before securing a fight-ending guillotine choke. At UFC 74, Stevenson defeated Kurt Pellegrino by unanimous decision. After the fight doctors determined that during the course of the fight Stevenson's nose had been fractured. With his string of victories at 155, Stevenson established himself as one of the top contenders in the UFC's very competitive Lightweight division. UFC Lightweight Championship Stevenson was set to fight BJ Penn for the UFC Interim Lightweight Championship at UFC 80 due to ongoing litigation regarding Sean Sherk's steroid use. On December 4, 2007, the California State Athletic Commission upheld a reduced suspension for Sherk, prompting the UFC to strip him of the lightweight championship. UFC President Dana White then confirmed that Stevenson and Penn's match would be to fill the vacant lightweight championship, but the winner of that fight would face Sherk at the next opportunity. Just seconds after the start of the fight, Penn knocked Stevenson down with a right uppercut. From the top position, Penn landed a strong elbow to the head of Stevenson—causing a serious cut on Stevenson's hairline. In the second round, Stevenson fought more aggressively but was still unable to threaten Penn. After taking Stevenson's back, Penn secured a fight-ending rear naked choke at 4:02 of the second round. UFC after loss to Penn At UFC 86, Stevenson returned to the Octagon and defeated Gleison Tibau by guillotine choke submission after pulling guard. Tibau tapped quickly at 2:57 in the second round. At UFC 91 on November 15, 2008, Stevenson was set to face top-contender Kenny Florian in a highly anticipated bout. Despite stating that he was offended to be considered an underdog against Florian, Stevenson was outclassed in the bout. After being taken down three minutes into the fight, Stevenson was mounted and eventually gave up his back to Florian. Florian forced Stevenson, who had just attained his Brazilian Jiu-Jitsu black belt, to submit to a rear