Question: When was the British former professional boxer born who competed from 1997 to 2012 and who was defeated in December 2007 against Floyd Mayweather?

Context paragraphs:
John Murray (boxer): John Murray (born 20 December 1984) is a British former professional boxer who competed from 2003 to 2014.  He held the English lightweight title from 2007 to 2008; the British lightweight title twice, from 2008 to 2010; and the European lightweight title from 2010 to 2011.  He also challenged once for the vacant WBA lightweight title in 2011.  John is the brother of British former Olympian Joe Murray.  Since retiring, Murray has opened his own gym – Murray Machines Gymnasium – in Reddish, where he trains both amateur and professional boxers.

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.

Chris Pearson (boxer): Chris Pearson (born November 12, 1990) is a former American amateur boxer and currently a professional boxer in the Middleweight division.  He signed a professional managerial contract with Al Haymon to launch his pro career, whose stable of fighters includes Floyd Mayweather Jr., Jermain Taylor and Paul Williams.

Floyd Mayweather Sr.: Floyd Mayweather Sr. (born October 19, 1952) is an American former professional boxer who competed from 1974 to 1990, and has since worked as a boxing trainer.  Fighting at welterweight during the 1970s and 1980s, Mayweather Sr. was known for his defensive abilities and overall knowledge of boxing strategy.  He is the father and former trainer of five-division boxing champion Floyd Mayweather Jr., and is credited for teaching his son the defensive skills that made him a champion.

Floyd Mayweather Jr.: Floyd Joy Mayweather Jr. (born Floyd Joy Sinclair; February 24, 1977) is an American professional boxing promoter and former professional boxer.  He competed from 1996 to 2007 and 2009 to 2015, and made a one-fight comeback in 2017.  During his career, he held 15 world titles in five weight classes and the lineal championship in four different weight classes (twice at welterweight), and retired with an undefeated record of 50–0, surpassing Rocky Marciano's record of 49–0.  As an amateur, Mayweather won a bronze medal in the featherweight division at the 1996 Olympics, three U.S. Golden Gloves championships (at light flyweight, flyweight, and featherweight), and the U.S. national championship at featherweight.

Bakhtiyar Tyleganov: Bakhtiyar Tyleganov (Бахтияр Тйлеганов; born January 5, 1976) is a retired boxer from Kazakhstan, who competed for his native country in the Men's Featherweight (– 57 kg) division at the 1996 Summer Olympics in Atlanta, Georgia.  There he was defeated in the first round by USA's eventual bronze medalist Floyd Mayweather Jr..

José Luis Castillo: José Luis Castillo (born December 14, 1973) is a Mexican former professional boxer who competed from 1990 to 2014.  Generally considered one of the best lightweights of his era, he is a two-time world champion at that weight, having held the WBC title twice, from 2000 to 2002 and 2004 to 2005; and the "Ring" magazine and lineal titles from 2004 to 2005.  Castillo is best known for his 2005 fight against Diego Corrales, for which he received Fight of the Year awards by both "The Ring" and the Boxing Writers Association of America, as well as his first fight with Floyd Mayweather Jr., which ended with controversial scorecards.

Floyd Mayweather Jr. vs. Juan Manuel Márquez: Floyd Mayweather vs. Juan Manuel Márquez, billed as Number One/Número Uno, was a welterweight superfight which took place on September 19, 2009, at the MGM Grand Arena in Las Vegas between five-division world champion Floyd Mayweather Jr. (39–0, 25 KO) and three-division champion Juan Manuel Márquez (50–4–1, 37 KO).  The fight served as a return to the ring for Mayweather, who, after his knock out victory of Ricky Hatton in December 2007, announced he would take a two-year layoff from boxing which later turned into retirement.

Sean Hughes (boxer): Sean Hughes (born 5 June 1982) is a British professional boxer born in Pontefract, West Yorkshire.  He now resides in South Shields.  He is most notable for defeating the then British Super Bantamweight Champion, Esham Pickering in December 2007.  Pickering was on the verge of stepping up to European and even World level before the bout and it was expected to be a routine victory for the Newark champion.  However, at the Nottingham Arena in front of the SKY TV cameras Hughes won a points victory over 8 rounds.

Ricky Hatton: Richard John Hatton, {'1': ", '2': ", '3': ", '4': "} (born 6 October 1978) is a British former professional boxer who competed from 1997 to 2012, and has since worked as a boxing promoter and trainer.  During his boxing career he held multiple world championships at light-welterweight and one at welterweight.  Hatton is ranked by BoxRec as the best British light-welterweight of all time, the third best in Europe, and eleventh best worldwide.  In 2005 he was named Fighter of the Year by "The Ring" magazine and the Boxing Writers Association of America.

Supporting paragraphs: Floyd Mayweather Jr. vs. Juan Manuel Márquez Ricky Hatton
Answer: 6 October 1978