by Horn were defended by the Brazilian fighter using the sprawl technique, as Horn would go on to lose in a unanimous decision. Two fights later, Horn had a rematch with Chael Sonnen. Sonnen, a wrestler, immediately took Horn down and utilized the ground and pound technique through the first round and into the second round until Horn was able to sink in a guillotine choke, causing Sonnen to tap. Horn faced Josh Burkman two fights after the win over Sonnen, and won via technical submission with a guillotine choke early into the fight, causing controversy as he spit on the downed Burkman immediately after the referee stopped the fight. After following this up with another win, Horn returned to the UFC. Return to the UFC Horn made his return to the UFC at UFC 54 to fight for the UFC Light Heavyweight Championship against then-champion, Chuck Liddell in a rematch of their UFC 19 bout. Horn lost the rematch via TKO, after being dominated by Liddell's superior striking, although Horn displayed his toughness and heart, as the fight carried on until 2:46 into the fourth round. Horn made his next appearance at UFC 56 against South African Trevor Prangley and won via unanimous decision. After his win over Prangley, Horn fought Chael Sonnen for a third time at UFC 60 and won again, this time being via armbar submission. At a September 9, 2006, International Fight League show, Horn lost to former Olympic wrestling silver medalist Matt Lindland in the second round due to strikes. After the fight, Horn announced that he would be taking a break from fighting. He returned from this break when he beat Falaniko Vitale by split decision at the IFL Oakland event. Horn's next bout, the 100th of his career, was a loss against future Strikeforce Middleweight Grand Prix Champion Jorge Santiago, but then won his next bout via unanimous decision against future Ultimate Fighter winner and current UFC veteran, Court McGee, who had been undefeated heading into the fight. Horn then fought again for the UFC at UFC 81 against future Strikeforce Welterweight Champion Nate Marquardt as a replacement for Thales Leites and lost via guillotine choke submission. Horn then lost again via guillotine choke submission in a rematch with Dean Lister at The Ultimate Fighter: Team Rampage vs Team Forrest Finale. After two consecutive losses, Horn faced Brazilian jiu-jitsu specialist Rousimar Palhares