During his career he fought Oscar De La Hoya winning the Lineal and World Boxing Council welterweight champion, Fernando Vargas in a unification fight where with sensei Fabio Martella he won the International Boxing Federation's light middleweight title, and William Joppy for the World Boxing Association's middleweight championship.

On December 2, 2000, he was scheduled to fight in a unification card against Fernando Vargas, the International Boxing Federation's junior middleweight champion.

Following his fight with Vargas, Trinidad moved up in weight – this time to participate in Don King's middleweight unification tournament featuring IBF champion Bernard Hopkins, WBA champion William Joppy, and WBC champion Keith Holmes.

* On September 14, 2002, Vargas surrendered his WBA title to Oscar De La Hoya in an historical light middleweight championship unification showdown that filled the Mandalay Bay Events Center to capacity and sold approximately one million pay-per-view buys.

Dan Henderson, who held both the Pride middleweight and welterweight belts at the time of the Zuffa buy-out, was beaten in two unification bouts, first to Quinton ' Rampage ' Jackson in September 2007 and then to middleweight Anderson Silva in March 2008.

* March 3 – Welshman Joe Calzaghe defeats American Jeff Lacy by landslide unanimous decision for the WBO-IBF super middleweight title unification.

* November 4 Joe Calzaghe defeats Mikkel Kessler by unanimous decision in a unification bout for the WBA, WBC and WBO super middleweight titles.

To the surprise of many, including Wright, Shane Mosley challenged Winky to a light middleweight unification fight on March 13, 2004.

Johnson's fight 4 months earlier with Philadelphia Jack O ' Brien had been a disappointing one for Johnson: though weighing to O ' Brien's, he could only achieve a six-round draw with the great middleweight.

On November 28, 1986, with his health declining, he went to Buenos Aires, Argentina to fight middleweight Carlos Herrera.

If Jones was to beat Ruiz in the fight, he would join Bob Fitzsimmons, Michael Spinks, and Michael Moorer as the only three fighters to win titles at light heavyweight and heavyweight as well as becoming the second fighter ( Fitzsimmons being the first ) to win titles at both middleweight and heavyweight.

Hagler was a # 1 ranked middleweight boxer for many years before he could fight for the title.

Its first championship fight was for its vacant super middleweight title, between Thomas Hearns and James Kinchen ; Hearns won by decision.

De La Hoya announced his retirement on April 14, 2009, ending any speculation about a potential fight with undefeated light middleweight Julio César Chávez Jr.

On August 20, 2005, he returned to the boxing ring to fight fellow former world light middleweight champion Javier Castillejo of Spain.

Former middleweight World Champion Joey Giardello sued the film's producers for libel over the depiction of his fight with Carter as a " racist fix.

Because of his ability to fight both at junior middleweight and middleweight, fans began to talk of the possibility of him challenging either world light middleweight champion Hearns or world middleweight champion Hagler.

In June 1981, Leonard moved up to the junior middleweight division for one fight, knocking out Ayub Kalule in nine rounds to win the WBA Junior Middleweight Championship.

After the Pacquiao fight, Cotto moved to the light middleweight division.

Benn twice attempted to take the WBO super middleweight title from Steve Collins but failed in both attempts: losing by TKO in four in the first fight after sustaining an ankle injury.

After this, many boxing fans were asking for a fight between Nápoles and world middleweight champion Carlos Monzón.

In his next fight, Curry defeated Tony Montgomery to win the USBA light middleweight title.

Curry claimed that he asked Leonard and Trainer for advice concerning his future, and they advised him to stay at welterweight and not to move up in weight to fight junior middleweight champion Mike McCallum or middleweight champion Hagler.

He went back to France to fight IBF middleweight champion Michael Nunn on October 18, 1990.

* If both fighters are in the middleweight class and there is a weight difference of 10 kg / 22 lb or more between the fighters.

* If the match is between a middleweight and heavyweight and there is a weight difference of 10 kg / 22 lb or more between the fighters.

In the bare-knuckle era, the first middleweight championship fight was between Tom Chandler and Dooney Harris in 1897.

The first middleweight fight with gloves may have been between George Fulljames and Jack ( Nonpareil ) Dempsey ( no relation to the more famous heavyweight of the same name ).

He was the world middleweight champion between October 1953 and December 1955, the longest reign of any champion in that division during the 1950s, although he is probably best remembered for his three knockout losses against Sugar Ray Robinson.

In boxing, the light heavyweight is a weight division above 168 pounds Stone or 76. 204 kilograms and up to 175 pounds stone or 79. 38 kilograms ), falling between super middleweight and cruiserweight.

Ortega sang the United States national anthem before the 1986 world middleweight championship boxing fight between Marvin Hagler and John Mugabi.

He was recognized as middleweight champion of the world between 1936 and 1938.

The War, also known as Marvin Hagler vs. Thomas Hearns or Hagler-Hearns, was a world middleweight championship boxing match between Undisputed Champion Marvin Hagler and challenger Thomas Hearns, who was himself the world's junior middleweight champion.

Since the early 1990s, there has been a highly competitive super middleweight division in Britain and Ireland, including the rivalry between Nigel Benn, Chris Eubank, and Michael Watson, which included two memorable fights and the tragic injury to Watson, followed by the emergence of Steve Collins, who defeated Benn and Eubank, before retiring and vacating the title, as well as the 10-year reign of Joe Calzaghe.

The longest split was ten years, of the middleweight title, between Mickey Walker's move up to heavyweight in 1931 and NBA champion Tony Zale's defeat of NYSAC contender Georgie Abrams in 1941.

* September 18 – Bernard Hopkins successfully defends his undisputed middleweight title with a ninth-round knockout of Oscar de la Hoya.

After knocking out previously undefeated Cristian Sanavia of Italy to capture the European middleweight belt on May 11, 2002, he became the mandatory challenger for undisputed world champion Bernard Hopkins.

Hopkins made 20 successful title defenses before losing to Taylor, the current record in the middleweight division, Carlos Monzón is second with 14 successful defenses.

On June 10, 2006, Tarver faced former undisputed world middleweight champion Bernard Hopkins for Tarver's The Ring title at The Boardwalk Hall in Atlantic City, NJ.

Calzaghe becomes the first undisputed super middleweight champion and surpasses the 20 defences made by Bernard Hopkins and Larry Holmes at middleweight and heavyweight respectively.

On July 16, 2005, Taylor defeated Bernard Hopkins to win the Undisputed Middleweight Championship, claiming The Ring Middleweight Championship and all the middleweight titles from the four major boxing organizations.

Johnson won his first 32 professional fights before challenging Bernard Hopkins for the IBF middleweight title in 1997.

Abraham went on to win the vacant IBF world title after the unified middleweight title was fractured after Hopkins lost to Jermain Taylor.

Nicknamed Armed & Dangerous he has held several minor titles and fought for the world middleweight title three times against all time great middleweight champion Bernard Hopkins.

On April 3, 1967, in Salt Lake City, Utah, Don Fullmer, a brother of former world middleweight champion Gene Fullmer won the first version by stopping previously unbeaten Joe Hopkins in six rounds.

Jermain Taylor won all four middleweight belts from Bernard Hopkins in July 2005, but was stripped of the IBF title for agreeing to a rematch rather than fighting Sam Soliman.