Season 1 1993 - 2009

The tournament featured fights with no weight classes, rounds, or judges. The three rules, no biting, no eye gouging, and no groin shots were to be enforced only by a $1,500 fine. The match only ended by submission, knockout, or the fighter's corner throwing in the towel.

UFC 2 featured a sixteen-man tournament format, the first and only one in UFC history, with the winner receiving $60,000.

UFC 3 used an eight-man tournament format, with the winner receiving $60,000. The tournament had no weight classes or weight limits.

UFC 4 used an eight-man tournament format, with the winner receiving $64,000. The event also featured three alternate fights.

UFC 5 used an eight-man tournament format, with the winner receiving $50,000.
The event also featured the first ever UFC Superfight

UFC 6 featured the crowning of the first UFC Champion to win the title in a non-tournament format.
UFC 6 also featured an eight-man tournament, and two alternate fights

UFC 7 featured an eight-man tournament, a UFC Superfight Championship match between reigning UFC champion Ken Shamrock and UFC 6 tournament winner Oleg Taktarov, and three alternate fights

Ultimate Ultimate 7.5 featured an eight-man tournament with the winner receiving $150,000. The event also featured two alternate fights

UFC 8 was the first UFC event located outside of the Continental United States. It featured an eight-man tournament, and a UFC Superfight Championship fight between reigning UFC champion Ken Shamrock and Kimo Leopoldo. The event also featured one alternate fight

UFC 9 was the first UFC production not to feature the tournament format

UFC 10 marked the UFC's return to the tournament format (which was removed in favor of single bouts at UFC 9). The card featured an eight man tournament

The card featured an eight-man tournament, as well as two alternate bouts in case of an injury

The card featured an eight man tournament with two alternate bouts, and was the UFC's second "Ultimate Ultimate" tournament, held to find the best of the winners and runners up from past UFC events. This event was the first to introduce the "no grabbing of the fence" rule.

UFC 12 was the first UFC event to feature weight classes; heavyweights (200 lb and over) and lightweights (under 200 lb) battled in two separate mini tournaments, each consisting of two semifinal bouts and a finals match.

UFC 13 featured two four man tournaments, a heavyweight tournament for fighters 200 lb or more, and a lightweight tournament for fighters under 200 lb, as well as two alternate bouts and a Superfight between Vitor Belfort and Tank Abbott.

UFC 14 featured two separate tournaments: a heavyweight tournament for fighters 200 lb or more, and a middleweight (formerly lightweight) tournament for fighters under 200 lb. The event also featured a Heavyweight Championship "Superfight" between Mark Coleman and Maurice Smith, as well as two alternate bouts in case of tournament injury.

UFC 15 was headlined by a UFC Heavyweight Championship bout between Maurice Smith and Tank Abbott. Abbott was brought in as a last-minute replacement for Dan Severn, who couldn't fight because of an injured hand.

UFC 15 featured a Superfight between Randy Couture and Vitor Belfort, a Heavyweight Tournament, and two alternate bouts. The Superfight was billed as a Heavyweight Title Elimination bout, which can be described as a #1 Contender's match, meaning the winner would advance to compete for the UFC Heavyweight Championship at the next event, UFC Japan.

The event featured a four-man heavyweight tournament, the first ever UFC Middleweight Championship bout, a Heavyweight Championship bout, a Superfight and an alternate bout. Ultimate Japan 1 featured the first UFC appearance of MMA legends Kazushi Sakuraba and Frank Shamrock.

UFC 16 featured the first ever UFC Lightweight tournament in the USA (for fighters under 170 lb), as well as a Middleweight Championship bout, a Heavyweight and a Middleweight Superfight, and two alternate bouts in case of tournament injury.

The event featured a four-man Middleweight Tournament, three Heavyweight Superfights, an alternate bout in case of tournament injury, and a Heavyweight "exhibition" bout.

Ultimate Brazil was the first appearance of the UFC in Brazil, and the third UFC event to take place outside the US. Ultimate Brazil marked the first UFC event (other than UFC 9) to not utilize the tournament format which, aside from UFC 23, was abandoned completely in following events. The event featured the first ever UFC Lightweight Championship fight, as well as a Middleweight Championship fight.

The event featured a UFC Lightweight Championship (now known as the Welterweight Championship) bout and six other bouts. UFC 18 was technically part two of what the UFC called "The Road To The Heavyweight Title", a tournament, spanning four events, held to crown the new UFC Heavyweight Champion after the title was vacated by Randy Couture (due to contract disputes).

UFC 19 featured the first appearance of collegiate wrestler Kevin Randleman, as well as the first televised appearance of former UFC Light Heavyweight Champion and Hall of Famer Chuck Liddell, who had fought at UFC 17 in an alternate untelevised bout. Future referee Dan Miragliotta makes his debut as UFC judge for the event.

UFC 20 was the final event of what the UFC called "The Road to the Heavyweight Title", a tournament of sorts spanning four events, held to determine the Heavyweight Champion after Randy Couture vacated the title (due to contract disputes with the UFC).

UFC 21 marked significant rule changes due to the Council of the Mixed Martial Arts Commission: preliminary bouts now consisted of two five minute-rounds, main card bouts were three five-minute rounds and championship bouts were five five-minute rounds (similar to the Unified Rules of Combat used today in the USA). UFC 21 was the first UFC event to adopt the 10-point must system, commonly used in boxing, to judge fights instead of each judge merely stating their choice of fighter. 10 points are awarded for fighters who win the round, 6-9 points for the fighter that loses the round. Points awarded for Octagon control, effective striking, grappling/near submissions, and aggressiveness.

The event was headlined by a Light Heavyweight Championship bout between Frank Shamrock and Tito Ortiz.

UFC 23 was the second UFC event to take place in Tokyo, Japan, where the newly formed PRIDE Fighting Championships were enjoying massive success. UFC 23 was headlined by a Heavyweight Championship Title bout between Kevin Randleman and Pete Williams (mixed martial artist), held to determine the champion after Bas Rutten's retirement.

The event featured the first UFC appearances of Ian Freeman, future UFC Middleweight Champion Dave Menne and Shonie Carter. UFC 24 also featured the first televised appearance of Jens Pulver, who had fought in an untelevised preliminary bout at UFC 22.

The event was the third UFC event to be held in Japan.
UFC 25 was headlined by a fight between Tito Ortiz and Wanderlei Silva, held to determine the new Light Heavyweight Champion following Frank Shamrock's retirement from the UFC.

The main card featured Welterweight Champion Pat Miletich defending his title against John Alessio, and Heavyweight Champion Kevin Randleman defending his title against Pedro Rizzo.

In the event, UFC legend Dan "The Beast" Severn returned to the promotion after more than 3 years on the independent scene to face off against top heavyweight contender Pedro Rizzo.

The event was headlined by the return of former Heavyweight Champion Randy Couture.

The event was the last UFC to be held in Japan until the UFC visited the country again during UFC 144

The card was headlined by two Title Bouts, a Light Heavyweight Championship Bout between Tito Ortiz and Evan Tanner, and the first UFC Bantamweight Championship Bout between Jens Pulver and Caol Uno.

The card was co-headlined by a Heavyweight title bout between Randy Couture and Pedro Rizzo, and a Welterweight Title Bout between Pat Miletich and Carlos Newton. The card featured the first appearance of former Welterweight Champion Matt Serra, and Kevin Randleman's first fight at 205.

The card was headlined by the first Light Heavyweight Championship Bout (previously called "Middleweight") between Tito Ortiz and Elvis Sinosic.

The card was headlined by three title bouts, Tito Ortiz vs. Vladimir Matyushenko for the Light Heavyweight Title (Vitor Belfort was unable to fight due to arm injury while training),Dave Menne vs Gil Castillo for the new Middleweight Title and Jens Pulver vs Dennis Hallman for the Lightweight Title.

The card was headlined by two Championship Bouts, Randy Couture faced Pedro Rizzo for the Heavyweight Title, and Matt Hughes faced Carlos Newton for the Welterweight Title.

UFC 35 featured two title bouts, Jens Pulver faced BJ Penn for the Lightweight Title and Murilo Bustamante faced Dave Menne for the Middleweight Title. This was the first UFC event to be headlined by a Lightweight bout.

The card was headlined by two title bouts, a Heavyweight Championship bout between Randy Couture and Josh Barnett and a Welterweight title bout between Matt Hughes and Hayato Sakurai. UFC 36 marked the last UFC appearance of former 170 lb Champion Pat Miletich, and the last appearance of Pete Williams. Miletich decided to concentrate on training his fighters, including Matt Hughes who was now the UFC champion in Pat's preferred weight class.

The card was headlined by a Middleweight Title Bout between Murilo Bustamante and Matt Lindland, and featured the first UFC appearances of Robbie Lawler and Ivan Salaverry.

The fight card was headlined by a bout between top contenders, returning Vitor Belfort, and Chuck Liddell. UFC 37.5 was the first UFC event to feature Joe Rogan as a color commentator but he would leave again to host Fear Factor, and return at UFC 40. Joe made several UFC appearances prior to UFC 37.5 as the behind-the-scenes interviewer starting at UFC 12.

This was the first UFC event to be held in United Kingdom and the first event to be held outside the United States since UFC 29, which took place in Japan. The card was headlined by a UFC Welterweight Championship bout between champion Matt Hughes and former titleholder Carlos Newton.

Headlining the event was a Heavyweight Title bout between Randy Couture and Ricco Rodriguez for the vacant title, which was stripped from Josh Barnett following a positive test for steroids.

UFC 40 contained one of the biggest, most important and most anticipated fights in UFC history, a UFC Light Heavyweight Championship fight between rivals Tito Ortiz and Ken Shamrock. Shamrock, a popular legendary fighter and former champion from the UFC's early years, was returning to the UFC for the first time since 1996. The fight was coined "the biggest fight in UFC history" by the UFC during the event.

UFC 41 featured two championship bouts, a Heavyweight Championship Bout between Ricco Rodriguez and Tim Sylvia, and a Lightweight Championship Bout between BJ Penn and Caol Uno. The event also marked the return of Tank Abbott to the UFC. Ken Shamrock served as the color commentator for this card.

UFC 42 was the first UFC event to take place in Florida. Headlining the event was a Welterweight Title bout between Matt Hughes and Sean Sherk.

Headlining the card was an Interim Light Heavyweight Championship match between future UFC Hall of Fame inductees Randy Couture and Chuck Liddell.

Headlining the card was a Light Heavyweight Championship unification bout between Tito Ortiz and Randy Couture.

This event marked the 10th anniversary of the UFC and to celebrate the anniversary the UFC inaugurated its Hall of Fame, with Royce Gracie and Ken Shamrock as the first inductees. UFC President Dana White said; "We feel that no two individuals are more deserving than Royce and Ken to be the charter members. Their contributions to our sport, both inside and outside the Octagon, may never be equaled.”

Headlining the card was a UFC Light Heavyweight Championship bout between Randy Couture and Vitor Belfort. The evening marked the UFC debut of future welterweight champion Georges St-Pierre.

Headlining the card was the long-awaited match between Chuck Liddell and Tito Ortiz

The featured contestants of the evening were Ken Shamrock and Kimo Leopoldo, who had met once before in 1996 in a UFC title fight at UFC 8, with Shamrock reigning victorious.

It featured the anticipated rubber match between Light Heavyweight Champion Vitor Belfort and Randy Couture, following a disappointing doctor's stoppage in their last encounter at UFC 46.

Headlining the card were Tito Ortiz and Patrick Côté. Côté was a late replacement for Lion's Den fighter Guy Mezger, who pulled out of the event after being taken to the hospital due to stroke-like symptoms. Patrick Côté was moved from the undercard to the main event.

The event was also to be held in Japan, but UFC President Dana White moved it back to Las Vegas. Headlining the card were fan favorites Tito Ortiz and Vitor Belfort.

Headlining the card were the coaches of The Ultimate Fighter, Randy Couture and Chuck Liddell.

This event was originally scheduled to take place at the Yokohama Arena in Japan with an Interim Heavyweight Championship bout between Andrei Arlovski and Mirko Filipović serving as the main event. However the lack of sponsorship for the event forced the event to be moved to Atlantic City.

Headlining the card were Chuck Liddell, the Light Heavyweight champion, and Jeremy Horn.

Headlining the card were the two coaches from The Ultimate Fighter 2, Rich Franklin and Matt Hughes, scheduled to defend their middleweight and welterweight titles

Headlining the card was an anticipated rubber match between top UFC stars and former coaches of The Ultimate Fighter Chuck Liddell and Randy Couture, widely touted and marketed as MMA's first major trilogy.

In keeping with the theme of the card, most of the fights featured an American fighter against a Canadian fighter.

This was the first UFC event held in California after the state's legalization of mixed martial arts contests. It was a sold-out show, and was one of the fastest sell outs in UFC history.

Headlining the card was a non-title catchweight (175 lb) match between then-current UFC Welterweight Champion Matt Hughes, and UFC Hall of Famer Royce Gracie, the winner of UFC 1, UFC 2 and UFC 4. This was Gracie's first match in the UFC and in the United States since UFC 5.

The main event was a Heavyweight Championship match between champion Tim Sylvia and former champion Andrei Arlovski. This was the third time these fighters had met, they had split the first two meetings. The co-main event was the highly anticipated rematch of TUF 3 coaches Tito Ortiz and Ken Shamrock.

The event, originally subtitled "Hughes vs. St-Pierre," was scheduled to feature a UFC Welterweight Title match between champion Matt Hughes and Georges St-Pierre.

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. However, some critics contend that the fight was stopped too early by referee Herb Dean. At the UFC 62 weigh-ins, UFC President Dana White announced the third Ortiz-Shamrock encounter. Tickets went on sale on Tuesday, August 29, 2006, and sold out in two days.

The card centered on a UFC Middleweight Championship defense by Rich Franklin against highly touted Anderson Silva. It was also Franklin's first defense in 7 months.

The card featured the anticipated rematch between Matt Hughes and Georges St-Pierre for the UFC Welterweight Championship – a fight originally scheduled for UFC 63. UFC 65 also featured a heavyweight title bout between Undisputed UFC Heavyweight Champion Tim Sylvia and Jeff Monson.

UFC 66's main event was a championship fight with two of the UFC's biggest light heavyweight stars, Light Heavyweight Champion Chuck Liddell defending his title against former champion Tito Ortiz. This fight was first announced by Ortiz at the UFC 63 weigh-ins on September 22, 2006.

This event was the first UFC pay-per-view event since UFC 60 to have no championship bouts on the card. In the main event, the middleweight winner of The Ultimate Fighter 4, Travis Lutter was scheduled to challenge middleweight champion Anderson Silva for the middleweight title, however he was not able to make weight and the fight was changed to a non-title contest.

UFC 68 was the first UFC event held in the state of Ohio, and coincided with the 2007 Arnold Sports Festival. The sold-out event produced the highest verifiable live attendance to date for a mixed martial arts event in North America with 19,079 spectators. At the time it was the largest attendance for a MMA event in the United States.

UFC 69: Shootout was the first UFC event ever held in the state of Texas.
The card was headlined by heavy favorite Georges St-Pierre defending his welterweight title against The Ultimate Fighter 4 welterweight winner Matt Serra.

2006 PRIDE Open-Weight Grand Prix Champion, Mirko Cro Cop fought Heavyweight contender Gabriel Gonzaga in the main event to determine the top contender for the UFC Heavyweight Championship held by Randy Couture.

The main event was the rematch between UFC Light Heavyweight Champion Chuck Liddell and Quinton "Rampage" Jackson. At the time of the event, Jackson was the only fighter to have an unavenged victory over Liddell, which occurred at PRIDE Final Conflict 2003 by TKO.

The main event featured lightweights Sam Stout and Spencer Fisher in a rematch from their first fight at UFC 58: USA vs. Canada, which Stout won by split decision.

UFC 72 continued the UFC's expansion into Europe, as it was the third event to take place in Europe and the United Kingdom after UFC 38 in 2002 (Royal Albert Hall in London, United Kingdom) and UFC 70 in April 2007 (MEN Arena in Manchester, United Kingdom). The card aired on pay-per-view in North America and via Setanta Sports in the United Kingdom and Ireland.

In the main event, Anderson Silva put his UFC Middleweight Championship belt on the line against Nate Marquardt.

The main event was a UFC Heavyweight Championship bout which featured champion Randy Couture defending his title against Gabriel Gonzaga, who knocked out Mirko Filipović at UFC 70 to become the number one contender.

The event was the fourth event held by the UFC in United Kingdom, following UFC 38 in London, UFC 70 in Manchester, and UFC 72 in Belfast.

The main event was anticipated to be Chuck Liddell versus Wanderlei Silva, a long-awaited match between the two popular former champions of the UFC and PRIDE, respectively; however, the main event featured a fight between former Light Heavyweight Champion Chuck Liddell and The Ultimate Fighter 2 alum Keith Jardine, with both fighters returning from knockout losses at UFC 71.

The main event featured Anderson Silva defending his Middleweight Championship against Cincinnati native and former champion Rich Franklin in a rematch of their October 2006 meeting at UFC 64, which Silva won by technical knockout.

This was the 100th event in UFC's history.

The main events featured the fight between Chuck Liddell and Wanderlei Silva, as well as the rubber match between former UFC Welterweight Champions Georges St-Pierre and Matt Hughes for the interim Welterweight championship.

The main event was originally scheduled as an interim lightweight championship fight; however, then-lightweight champion Sean Sherk was stripped of his title after the California State Athletic Commission upheld his suspension for testing positive for the anabolic steroid Nandrolone. With the lightweight championship vacated, the Penn vs. Stevenson bout was altered to be for the undisputed lightweight championship.

The main event featured Tim Sylvia and Antônio Rodrigo "Minotauro" Nogueira for the UFC Interim World Heavyweight Championship. UFC Heavyweight champion Randy Couture declined a championship fight with Nogueira,which resulted in the creation of the interim title.
This event also saw the UFC debut of WWE wrestler Brock Lesnar in a bout against former UFC heavyweight champion Frank Mir.

The main event was a UFC & Pride FC middleweight title unification match between UFC middleweight champion Anderson Silva and PRIDE FC welterweight champion Dan Henderson.

The event on this date was originally scheduled to be called UFC 84,but following the cancellation of a tentatively scheduled March 8, 2008 event in England,the event's title was changed to UFC 83 instead.

The card featured the return of Sean Sherk, who was suspended and stripped of his UFC Lightweight Championship after he tested positive for steroids at UFC 73.

The main event was ultimately changed to Matt Hughes against Thiago Alves. Hughes took the fight on short notice as a favor to the UFC and Alves came in four pounds overweight.

The main event was between Quinton "Rampage" Jackson and Forrest Griffin, coaches on The Ultimate Fighter: Team Rampage vs. Team Forrest, and was for Jackson's UFC Light Heavyweight Championship.

The card was headlined by a welterweight championship bout between champion Georges St-Pierre and challenger Jon Fitch.

The event served as the lead-in to the premiere of The Ultimate Fighter: Team Nogueira vs. Team Mir on Spike TV

The event was headlined by a middleweight bout between Michael Bisping and Chris Leben.

The main event featured UFC Middleweight Champion Anderson Silva vs. number #1 contender Patrick Côté. Silva's original opponent was rumored to be Yushin Okami, but the fight was cancelled after Okami suffered a hand injury.

The main event featured the return of UFC Heavyweight Champion Randy Couture versus WWE's Brock Lesnar in a title bout.

The main event featured the return of UFC Heavyweight Champion Randy Couture versus WWE's Brock Lesnar in a title bout.

Featured were the finals from The Ultimate Fighter: Team Nogueira vs Team Mir in both the Lightweight and Light Heavyweight divisions.

The main event featured UFC Light Heavyweight Champion Forrest Griffin, against undefeated challenger Rashad Evans. This was the first time that two winners of The Ultimate Fighter competed in a title fight against each other.

The main event featured a Light Heavyweight bout between former UFC Middleweight Champion Rich Franklin and former Pride Middleweight Champion and Pride Welterweight Champion Dan Henderson. The winner of the fight would become the coach opposite Michael Bisping for the ninth season of The Ultimate Fighter: United States vs. United Kingdom.