UFC 22: Only One Can be Champion was a mixed martial arts event held by the Ultimate Fighting Championship on September 24, 1999 at the Lake Charles Civic Center in Lake Charles, Louisiana.

The event was headlined by a Middleweight Championship bout between Frank Shamrock and Tito Ortiz, and also featured two preliminary bouts, a middleweight bout, two heavyweight bouts, and two lightweight bouts. The Ortiz-Shamrock fight was notable for being widely considered one of the best MMA fights ever at the time it took place, due to the complete range of skills showed by both fighters. The bout featured back-and-forth action which saw multiple takedowns from Ortiz and crisp kickboxing displayed by Shamrock, who eventually forced Ortiz into submission with brutal punches, elbows, and hammerfists to the temple late in the 4th round. It was also clear that Ortiz was exhausted by the 4th round, part of the strategy implemented by Shamrock. This match helped changed Ortiz's training routine to include more cardio training, and ironically he became one of the best cardio-fighters following this match. Unlike Ken Shamrock, Tito really respected Frank, wearing his shirt at the end of the match, conceding who is the true champion.

Year 22 (XXII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Agrippa and Galba (or, less frequently, year 775 Ab urbe condita). The denomination 22 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Vítor Vieira Belfort (Portuguese pronunciation: [ˈvitoʁ viˈejɾɐ bɛwˈfɔʁ]; born April 1, 1977) is a Brazilian mixed martial artist and former UFC Light Heavyweight Champion. Belfort was born in Rio de Janeiro and studied jiu-jitsu with the Gracie family, namely Carlson Gracie. He received a black belt under Carlson and currently trains with Xtreme Couture, fighting in the middleweight division. He is currently ranked as the #3 middleweight in the world by MMA Weekly.

Vítor was born on April 1, 1977 in Rio de Janeiro, Brazil to a French father and a Greek mother. Belfort is married to Joana Prado and together they have three children, a son named Davi (born February 5, 2005), a daughter named Victoria (born October 31, 2007), and a daughter named Kyara (born June 7, 2009).

Belfort also had a small part in a reality show on Brazilian television and appeared next to his wife when she was photographed for the Brazilian edition of Playboy.

On January 9, 2004, Vítor's sister, Priscila Belfort disappeared and the relatives received no information about her. In August 2007, a woman (identified as Elaine Paiva) confessed that she participated in her kidnapping and killing and that she was kidnapped to pay off a four thousand dollar debt Paiva had with drug dealers. Paiva was arrested along with three others alleged to be involved in the kidnapping. The group allegedly buried her body in the woods in Rio de Janeiro where police conducted searches but her remains have never been found. Her family however do not accept this version and believe that Priscila is still alive somewhere. Vítor still maintains a missing sign in the Brazilian version of his website.

Jared Hamman is an American mixed martial artist who competes in the middleweight division of the Ultimate Fighting Championship. He is known for being able to take mass amounts of punishment, UFC Commentator Joe Rogan has described Hamman as having a "rubber chin".

Prior to beginning his mixed martial arts career, Hamman played college football as a defensive end at the University of Redlands. In addition, Hamman received a B.A. in History from the school.

Hamman began training mixed martial arts at the Unbreakable Gym under Brian Warren in November 2005 and made his professional debut in 2006. He currently trains with Vladimir Matyushenko on the VMAT team. Hamman received national attention while fighting for the now-defunct EliteXC under their ShoXC banner on the cable network Showtime, most notably for a two-fight series against Po'ai Suganuma.

Hamman made his UFC debut against Alexander Gustafsson on November 14, 2009 at UFC 105. Hamman lost via first round KO.

After that, Hamman faced fellow former college football player Rodney Wallace on March 27, 2010 at UFC 111. He won the fight via unanimous decision and the bout won both fighters the Fight of the Night honors.

Brock Edward Lesnar (/ˈlɛznər/; born July 12, 1977) is an American professional wrestler, actor, former mixed martial artist and amateur wrestler, signed with WWE and appearing on its Raw brand. He is also a former UFC Heavyweight Champion and former #1 ranked mixed martial arts (MMA) Heavyweight by Sherdog; he was ranked #5 before he announced his retirement at the end of 2011. Lesnar is an accomplished amateur wrestler, winning the 2000 NCAA heavyweight wrestling championship and placing second in 1999, losing in the finals to 1999 world freestyle wrestling champion and future New England Patriots offensive lineman Stephen Neal.

He gained prominence in World Wrestling Entertainment (WWE) from 2002 to 2004, where he is a former three-time WWE Champion, becoming the youngest WWE Champion at age 25 with his first reign. Lesnar was the 2002 King of the Ring and the winner of the 2003 Royal Rumble. After leaving WWE, Lesnar pursued a career in the NFL. He played during the preseason for the Minnesota Vikings, but ended up being a late cut. Lesnar returned to professional wrestling at the end of 2005, and joined New Japan Pro Wrestling (NJPW), where he won the IWGP Heavyweight Championship in his first match. He was officially stripped of the title by NJPW in July 2006, and took the physical belt with him to Inoki Genome Federation (IGF), where he was still recognized as IWGP Champion until June 2007.