|UFC 64: Unstoppable|
|Promotion||Ultimate Fighting Championship|
|Date||October 14, 2006|
|Venue||Mandalay Bay Events Center|
|City||Las Vegas, Nevada|
|Attendance||10,173 (8,913 paid)|
|Total purse||$209,000 (disclosed only)|
UFC 64: Unstoppable was a mixed martial arts event held by the Ultimate Fighting Championship on Saturday, October 14, 2006. The event took place at the Mandalay Bay Events Center, on the Las Vegas Strip in Nevada and was broadcast live on pay-per-view in the United States and Canada.
The card also featured a UFC Lightweight Championship bout between The Ultimate Fighter alumnus Kenny Florian and longtime UFC veteran Sean Sherk. It was the first Lightweight Championship bout since UFC 41 in 2003, when B.J. Penn and Caol Uno fought to a draw.
A planned match between Keith Jardine and Mike Nickels was cancelled a day before the event when Nickels reaggravated a previous back injury sustained during training. A replacement could not be found on short notice.
- Pellegrino wins by submission (rear naked choke) at 2:04 of round one. This preliminary bout was not aired on the broadcast.
- Lightweight bout: Clay Guida vs. Justin James
- Guida wins by submission (rear naked choke) at 4:42 of round two. The fight, although preliminary, was aired on the broadcast.
- Okami wins by TKO (punches) at 1:38 of round three. This preliminary bout was not aired on the broadcast.
- Fisher wins by TKO (punches) at 4:38 of round one.
- Marrero wins by split decision after three rounds. The judges scored the bout 29–28, 28–29, 29–28.
- Fitch wins by unanimous decision after three rounds. The judges scored the bout 30–27, 30–27, 30–25.
- Sherk wins by unanimous decision to win the vacated UFC Lightweight Championship after five rounds. The judges scored the bout 49–46, 49–46, and 50–45.
- Silva wins by KO (knee) at 2:59 of round 1 to become the new UFC Middleweight Championship.
- Fight of the Night: Sean Sherk vs. Kenny Florian
- Knockout of the Night: Anderson Silva
- Submission of the Night: Clay Guida
- "Ivan's Blog- Ivan Trembow's Self-Important, Random Rants on Mixed Martial Arts, Video Games, Pro Wrestling, Television, Politics, Sports, and High-Quality Wool Socks". Ivansblog.com. 2006-10-24. Retrieved 2014-02-16.
- "Wrestling Observer Figure Four Online : News". Wrestlingobeserver. Retrieved 2014-02-16.
- "Ivan's Blog- Ivan Trembow's Self-Important, Random Rants on Mixed Martial Arts, Video Games, Pro Wrestling, Television, Politics, Sports, and High-Quality Wool Socks". Ivansblog.com. 2006-10-17. Retrieved 2014-02-16.
- "UFC, Mixed Martial Arts (MMA) News, Results, Fighting". Sherdog.com. Retrieved 2014-02-16.