UFC 107: Penn vs. Sanchez was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on December 12, 2009 in Memphis, Tennessee at the FedExForum.

On October 21, it was announced that a previous matchup between welterweight contenders Thiago Alves and Paulo Thiago had been changed to Alves vs. Jon Fitch because Fitch's opponent for UFC 106, Ricardo Almeida, suffered an injury. Paulo Thiago fought on UFC 106 on November 21 against UFC newcomer Jacob Volkmann and won the fight by unanimous decision.

It was then announced on October 30 that Fitch would again be without an opponent as Alves was forced to withdraw because of a posterior cruciate ligament tear. It was later announced that Jon Fitch would face Mike Pierce at UFC 107.

Paul Buentello was scheduled to face Todd Duffee on the card, but an injury forced Duffee to pull out. Buentello faced Stefan Struve on the card.

A middleweight bout between Alan Belcher and Wilson Gouveia was changed to a 195-pound catchweight bout after Gouveia asked for a 190-pound catchweight limit, but Belcher gave a counter-offer of 195 pounds.

Francisco Santos Miranda, III (born May 24, 1979), better known as Frank Mir, is an American mixed martial artist, as well as a black belt in Brazilian Jiu-Jitsu and Kenpō Karate.

Mir, one of the most accomplished heavyweights in MMA history, is a two time UFC Heavyweight Champion . He currently holds the record for most victories in the heavyweight division of the UFC with 14 and most wins by submission in UFC Heavyweight division history with 8. He is also the only man in UFC history to win a bout by toe hold. As of January 2012 he is ranked the #4 In the ESPN MMA Power Rankings.He holds the distinction of being the first and only man to both knock out and submit MMA legend Antônio Rodrigo Nogueira. Mir is the only person to submit former UFC Heavyweight Champion and NCAA Division I wrestler Brock Lesnar and highly regarded striker Cheick Kongo. Frank Mir has had more fights in the UFC than anyone else currently competing in the heavyweight division.

His father convinced him to begin wrestling, on the basis that it could help him avoid submissions. Mir then began wrestling at Bonanza High School in Las Vegas, Nevada where during his junior year he lost his first nine matches. During his senior year (1998) he went 44–1 and won the state championship. He was also on the school's football team that reached the Southern Zone semifinals in 1997 and where he played as fullback and defensive end. He also took up track and field in 1998 where his discus throw of 177 feet, 10 inches is still a Sunset Regional record.

Cheick Guillaume Ouedraogo (born May 17, 1975), more commonly known as Cheick Kongo, is a professional French heavyweight mixed martial artist and kickboxer currently fighting in the Ultimate Fighting Championship. He currently trains with Quinton "Rampage" Jackson and formerly Michael Bisping at the Wolfslair MMA Academy, and holds notable wins over Mirko Filipović, Paul Buentello, Antoni Hardonk, Matt Mitrione, and Pat Barry. He is also the only fighter to have ever gone to a decision with former heavyweight champion, Cain Velasquez. Kongo is ranked the 10th best heavyweight in the world by ESPN.

Born to a Burkinabé father and a Congolese mother with his brother, Ben Millard, Kongo began training in martial arts when he was 5 years old, learning Kendo and Karate. As he grew older, he began to expand his repertoire and trained in Muay Thai, kickboxing and Greco-Roman wrestling. At age 19, he learned of Pencak Silat, an Indonesian martial art, and was coached by Charles Joussot, Franck Roppers and his brother Ben. He's also a cousin of rugby star Fulgence Ouedraogo, the French back-rower. Cheick is also a columnist for the French MMA magazine, Top Fight.

Dana White (born July 28, 1969) is the current President of the Ultimate Fighting Championship (UFC), a mixed martial arts organization based in the United States.

Born in Manchester, Connecticut on July 28, 1969, White grew up in Las Vegas, Nevada, Ware, Massachusetts and Levant, Maine. White is a passionate Boston Red Sox fan. During his youth, he bounced back and forth between Boston and Maine. He attended the University of Massachusetts Boston but did not finish; however, while there he did launch a boxing program for inner-city youth.

White has a background as an aerobics instructor. In 1992, White established Dana White Enterprises in Las Vegas. He conducted aerobics classes at three gyms in the Las Vegas area and began managing MMA fighters Tito Ortiz and Chuck Liddell.

While working as a manager, White learned that Semaphore Entertainment Group, the parent company of the UFC, was looking for a buyer for the UFC. White contacted childhood friend Lorenzo Fertitta, an executive at Station Casinos, and a former commissioner of the Nevada State Athletic Commission. Within a month, Lorenzo and his older brother Frank bought the UFC, with White installed as its president. White currently owns about 9% of Zuffa, LLC, the entity the Fertitta brothers created to own and manage the UFC.

Diego J. Sanchez (born December 31, 1981) is an American mixed martial artist (MMA) of Mexican descent, with a background in wrestling and Gaidojutsu, system of submission wrestling developed by his longtime trainer Greg Jackson. He currently fights as a welterweight with the Ultimate Fighting Championship (UFC). Sanchez is currently ranked as the #9 welterweight fighter in the world by MMAWeekly.

Sanchez was born in Albuquerque, New Mexico. He attended Del Norte High School, where he became a state champion wrestler.^{[citation needed]}

Diego Sanchez wrestled in New Mexico before starting training MMA while working for UPS. Sanchez eventually joined Jackson's Submission Fighting, still while working for UPS, managing the time between work and training. In 2002, he made his MMA debut for King of the Cage where he also later became a champion.

His UFC debut came when he was chosen as a participant on the first season of the reality show, The Ultimate Fighter. Presented as a young, focused middleweight who only had one goal, to become a UFC champion, he won a contract with the UFC after winning a fight against Kenny Florian, becoming the middleweight winner for the first season of the show. On the show, Sanchez was known for being the "odd-ball" of the group, practicing yoga at odd moments and trying to extract "energy" from a lightning storm, and was also a self-proclaimed "Zen master". Sanchez' last fight before his loss to Josh Koscheck was against Joe Riggs on December 13, 2006 at UFC Fight Night 7. Sanchez landed a right hook that knocked Riggs down, followed by a running knee that knocked Riggs out. Sanchez won at 1:45 of the first round, scoring the first UFC knockout of his career.