UFC 124: St-Pierre vs. Koscheck 2 was a mixed martial arts event held by the Ultimate Fighting Championship on December 11, 2010 at Bell Centre in Montreal, Quebec. The event was the fourth that the UFC has hosted at the Bell Centre following UFC 83, UFC 97 and UFC 113 and the fifth event held in Canada along with UFC 115 which was held in Vancouver, British Columbia.

A training injury forced Jason MacDonald out of his fight with Rafael Natal on October 20, 2010. He was replaced by UFC newcomer Jesse Bongfeldt.

On October 26, 2010, Anthony Waldburger had to pull out of his fight with Matt Riddle due to an injury. He was replaced by Sean Pierson.

UFC 124 featured live preliminary bouts streamed on UFC.com rather than Spike TV due to the 2010 Spike Video Game Awards being aired in the same time slot.

UFC 124 marked the first – and only – time that the UFC let the fans vote online for the Fight of the Night.

Fighters were awarded $100,000 bonuses.

Josh D. Koscheck (born November 30, 1977) is an American mixed martial artist from Waynesburg, Pennsylvania, a former collegiate wrestling champion and is currently fighting at welterweight for the Ultimate Fighting Championship. He made his debut with the organization on the first season of the reality television show, The Ultimate Fighter. Koscheck has fought for the company a record 19 times since 2005. Koscheck is often ranked among the top ten welterweights in the world by leading mixed martial arts publications. Sherdog currently ranks Koscheck at No. 7.

Josh Koscheck has a strong, well-documented base in collegiate wrestling, dating back to his years at Edinboro University of Pennsylvania, where he attended the university on an athletic scholarship. In 2001, during his Junior season, Koscheck won all 42 of his wrestling matches and went on to become the NCAA Division I Champion in the 174 lb weight class.

In addition to being a four-time NCAA Division I All-American (placing 4th, 2nd, 1st and 3rd respectively), Koscheck is a three-time recipient of the PSAC Wrestler of the Year award and earned the Eastern Wrestling League Achievement Award twice.

Joseph James "Joe" Rogan (born August 11, 1967) is an American martial artist, stand-up comedian, actor, writer and color commentator. He is best known for playing Joe Garrelli on the NBC sitcom NewsRadio, commentating for the Ultimate Fighting Championship, hosting the NBC reality show Fear Factor and The Joe Rogan Experience podcast.

Rogan was born in Newark, New Jersey. His paternal grandfather was Irish and the remainder of his ancestry is Italian.

In 1981, at age fourteen, he became a practitioner of Kenpo Karate before transitioning to Taekwondo. He eventually gained a 2nd dan black belt. A four-time state champion in Massachusetts, in 1987 he was the USA Taekwondo U.S. Open Champion. In 1996, he began training in Brazilian Jiu-Jitsu under Jean Jacques Machado, eventually earning his brown belt. In addition, he holds a brown belt in 10th Planet Jiu-Jitsu under Eddie Bravo.

He also practiced and competed in kickboxing.

In 1994, he co-starred on the Fox comedy Hardball as Frank Valente, the young, ego-centric star player on a fictional professional baseball team. From 1995 to 1999, he co-starred on the comedy NewsRadio. He portrayed Joe Garrelli, the electrician at WNYX, a news radio station in New York City. In 2002, he appeared on the episode "A Beautiful Mind" of Just Shoot Me as Chris, Maya Gallo's boyfriend. In 2011, Rogan played his first major character in a movie in the Kevin James movie Zookeeper. He is slated to play himself in an upcoming action-comedy starring Kevin James called Here Comes the Boom, set to be released in the summer of 2012.

Stefan J. Struve (born February 18, 1988) is a Dutch mixed martial artist who competes as a heavyweight in the Ultimate Fighting Championship. Struve is currently the tallest fighter in the UFC, standing 6 ft 11.5 in.

Growing up in the Netherlands, Stefan Struve played football until the age of 14. After his brother took him to the local martial arts gym (owned by Bob Schreiber), he decided to pursue a career in mixed martial arts instead. He had his first amateur MMA bout at age 16, and won via head kick knockout.

Struve made his professional debut for the GFN organization when he was 17, fighting John De Wilde at Gentlemen Fight Night. By late 2008, he had racked up a record of 16–2, losing once (in his second fight) via injury to Romualds Garkulis and again in the second round of a Star Of Peresvit tournament in Ukraine, to Christian M'Pumbu.

In 2008, Struve negotiated with the Dream and Affliction promotions, before signing a four-fight deal with the UFC.

Struve lost his UFC debut bout at UFC 95 to Junior dos Santos in the first round, after dos Santos stormed Struve with an aggressive flurry of punches. Struve won his next fight at UFC 99, over Denis Stojnic. Struve was cut open by hammerfists from Stojnic while on his back in the first round and, despite bleeding profusely, persevered in the second round and gained Stojnic's back, eventually locking in a rear naked choke to win by submission at 2:37 of the second round.

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.