UFC Fight Night 6.5: Ortiz vs. Shamrock 3 was a mixed martial arts event held by the Ultimate Fighting Championship on October 10, 2006. The event took place at the Seminole Hard Rock Hotel and Casino in Hollywood, Florida and was broadcast live on Spike TV in the United States and Canada. The main event featured the third and final encounter between Tito Ortiz and Ken Shamrock. At UFC 61, the two fighters met for a second time, with Ortiz reigning victorious via technical knockout.