Question: What is the name of the boxer who fought in the 2009 Fight of the year and retired from boxing in 2011?

Context paragraphs:
Danny Needham: Danny Needham (May 20, 1867 - September 12, 1922) was an Irish-American boxer.  Based in St. Paul, Needham started his pro boxing career by challenging lightweight bare-knuckle champion Tommy Danforth to a fight.  The fight agreement stipulated that Needham needed to knock his opponent out to win the fight, so the fight was awarded to Danforth even though Needham was better than him through 8 rounds.  Needham would become the lightweight champion of the Northwest in 1888 and he would controversially lose a bout for the lightweight championship of America.  Around 1889, he made the jump to welterweight.  One of his first fights in his new weight class is one of the longest boxing matches ever recorded, a 100 round fight against Patsy Kerrigan.  The fight was declared a draw, with both men being in the brink of death.  The following year, Needham would challenge Tommy Ryan for the welterweight world title.  But he would end up losing after 76 rounds, in another one of the sport's longest matches.  Needham moved to Alaska during the Klondike gold rush.  He spent the final years of his life in the St. Peter State Hospital, before dying of throat cancer in 1922.  He was inducted to the Minnesota Boxing Hall of Fame in 2013.

Juan Manuel Márquez vs. Juan Díaz II: Juan Manuel Márquez vs. Juan Diaz was a boxing lightweight title superfight, in a rematch of the 2009 Fight of the Year.  Marquez, went to Diaz's hometown of Houston to face him at the Toyota Center in February 2009 in what turned out to be an all-action slugfest, one that Marquez won via ninth-round knockout.

Shoot Boxing World Tournament 2010: Shoot Boxing World Tournament 2010 or S-Cup 2010 was a shoot boxing event promoted by Caesar Takeshi.  It was the seven bi-annual (70kg/154lbs weight class) Shoot Boxing World Tournament, featuring an eight-man single elimination format, with one reserve fight, all fought under Shoot Boxing Rules.  The eight finalists and two reserve fighters were a mixture of invitees or had been involved in previous events (for more detail on this see the bulleted list below).  As well as tournament matches there were also two 'Opening Fights', a 'Women's Fight' and three 'Super Fights' all fought under Shoot Boxing Rules (various weight classes).  In total there were twenty-two fighters at the event, representing six countries.

S-Cup Europe 2008: S-Cup Europe 2008 was a martial arts event co promoted by Shoot Boxing Europe and East Side Promotions.  It was a preliminary qualifying tournament for the Shoot Boxing World Tournament 2008, involving ten fighters (two being reservists) with all bouts fought under Shoot Boxing rules (70 kg/154 lbs).  All the tournament fighters were invitees selected on the basis of their achievements in kickboxing, Muay Thai and Savate (more information on the fighters is provided by the bulleted list below).  As well as tournament matches there were also a number of opening fights and super fights (including a retirement fight), and a W.P.K.L. European title fight.  One of the opening fights was fought under Shoot Boxing rules while the rest of the matches were fought under Muay Thai rules.  In total there were thirty four fighters at the event, representing twelve countries, with weight classes ranging from under 32 kg to over 95 kg.

Thomas Americo: Thomas Americo (December 24, 1958 – September 7, 1999) was an East Timorese professional boxer.  Americo won the Oriental and Pacific Boxing Federation's Super Lightweight title in only his second recorded professional fight, and in only his third fight, he became the first Indonesian (at the time, East Timor had not gained independence from Indonesia) fighter to challenge for a world title, when he fought World Boxing Council Super Lightweight (Junior Welterweight) champion of the world, Saoul Mamby.  In becoming the first Indonesian to fight for a world title, Americo became also the first boxer from East Timor to do so.

Carlos Quintana (boxer): Carlos Quintana (born November 6, 1976) is a retired Puerto Rican professional boxer.  As an amateur Quintana represented Puerto Rico.  He debuted as a professional in 1997.  On February 24, 2006, he participated in his first professional championship fight, defeating Raul Bejerano for the World Boxing Organization's Latino welterweight championship.  His first defense took place on June 24, 2006 when he defeated Joel Julio by unanimous decision in a welterweight title eliminator.  In this fight he also won the World Boxing Council's Latino welterweight championship.  His first world title fight took place on December 2, 2006, when he fought against Miguel Cotto for the World Boxing Association welterweight title.  Cotto won the fight by technical knockout.  On February 9, 2008, Quintana challenged Paul Williams for the WBO welterweight championship, winning the fight by unanimous decision.  He entered the Light Middleweight division to face Deandre Latimore, knocking Latimore out to win the NABO Light Middleweight championship.

George Chuvalo: George Louis Chuvalo, CM (born September 12, 1937) is a retired Canadian professional boxer who was a five-time Canadian heavyweight champion, and two-time world heavyweight title challenger.  Chuvalo, who is considered by many to have one of the best chins in boxing history, was never knocked down in his amateur career or his 93-fight professional career and was ranked #4 on ESPN's greatest chin in boxing history list.  Chuvalo lost to Hall of Fame heavyweights such as Floyd Patterson, Muhammad Ali, Joe Frazier and George Foreman, but was credited for his spirited performances.  He did defeat top contenders such as Yvon Durelle, Doug Jones, Jerry Quarry and Cleveland Williams.  He fought for the world title twice, losing a controversial decision to Ernie Terrell and another decision in his first fight with Ali.

Wayne Elcock: Wayne Elcock (born 12 February 1974) is a British former professional boxer.  Who was managed by Frank Maloney at the start of his career and promoted by Panix promotions before moving after 2 winning fights to Frank Warren, then later to Mick Hennessy.  Elcock was trained in Leicester to begin with by Jez brogan, before moving to London to be trained by both Frank Maloney and Alan Smith, along with several visits to america to build on his skills, where Wayne worked with Goody Petronelli the trainer of former world champions Marvelous Marvin Hagler and Steve Collins at his famous Brockton gym.  Wayne came back to his home town to team up with Birmingham's most successful boxing trainers brothers Paddy & Tommy Lynch.  Knocking out fellow contender Darren Rhodes in 1 minute 30 seconds in Elcocks homecoming and first ever fight with the Lynch brothers in Birmingham at a sold out Aston Events Centre, this setting up his first attempt at the prestigious British title Lonsdale Belt against Plymouth's Scott Dann (boxer) in the first British title fight to ever be scored by three judges, after defeat Wayne bounced back with two back to back knockout victories one of them a British title eliminator winning by TKO against Scotland's Lawrence Murphy, who was the only other boxer to have beaten Elcock, In Wayne's next contest he faced the English champion Steven Bendall who was to be yet another stopped, but this time over eight punishing rounds and setting up his next contest where he would become the first British boxer to beat long standing British champion Howard Eastman to win the coveted Lonsdale Belt in 2007, Elcock also won the Commonwealth title and the minor WBU World Middleweight title becoming the first Birmingham born fighter to ever hold a version of a World title.  Elcock challenged for the IBF middleweight title against the unbeaten World champion Arthur Abraham on 8 December 2007, losing by a fifth round knockout.  Wayne bounced back from his world title attempt defending the lonsdale belt with a TKO win against local Dudley rival Darren McDermott, before losing the next defence to fellow Birmingham fighter Matthew Macklin in the Battle of Brum Elcock retired at the age of 36 in 2009 to concentrate fully on his other business matters and today Wayne can be found mentoring in schools and behind the counter at Mad Dog's Boxing shop in Boldmere, Birmingham, as well as coaching in the evening at the multi award winning company Wayne Elcock's Box Clever and at his own amateur boxing club Wayne Elcock's Boxing Academy, located in Chelmsley Wood, not far from where he grew up.

Juan Díaz (boxer): Juan Díaz (born September 17, 1983) is an American professional boxer who held the unified WBA (Super), IBF, and WBO lightweight titles in 2008.  He announced his retirement from boxing in 2011 to attend the University of Massachusetts Dartmouth Law School, but returned to the sport in 2013.

Cassius Clay vs. Donnie Fleeman: Cassius Clay (soon Muhammad Ali) fought an eight-round boxing match with Texan Donnie Fleeman in Miami on February 21, 1961.  Prior to this fight, Fleeman had a record of 51 fights with 45 wins including 20 knockouts.  Clay won the bout through a technical knockout after the referee stopped the fight in the seventh round.  This was the first time Clay had gone over six rounds in a boxing match.  It was also the first time Fleeman had ever been knocked down in a boxing match.  Fleeman retired from boxing after this fight.

Supporting paragraphs: Juan Manuel Márquez vs. Juan Díaz II Juan Díaz (boxer)
Answer: Juan Díaz