Question: Roger Leonard was a professional boxer, from Palmer Park, Maryland, he is the older brother of which boxing legend, an American former professional boxer, motivational speaker, and occasional actor, best know as?

full_context: Document 1: Pepe Correa: Jose "Pepe" Correa is a boxing trainer who has trained Sugar Ray Leonard, Roberto Durán, Lennox Lewis, Simon Brown and Maurice Blocker. He was one of the trainers on the 3rd season of the boxing reality TV series, The Contender, premiering September 4, 2007 on ESPN.
Document 2: Sugar Ray Seales: "Sugar" Ray Seales, (born September 4, 1952) was the only American boxer to win a gold medal in the 1972 Summer Olympics. As a professional, he fought middleweight champion Marvin Hagler three times. He is also the former NABF and USBA middleweight champion.
Document 3: 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.
Document 4: John Mugabi: John Mugabi (born 4 March 1960) is a Ugandan former professional boxer who competed from 1980 to 1991, and 1996 to 1999. He held the WBC super-welterweight title from 1989 to 1990, and challenged twice for world titles at middleweight, including the undisputed championship. Mugabi was part of an exceptionally talented group of light-middleweights and middleweights during a "golden era" of the 1980s which included Marvin Hagler, Sugar Ray Leonard, Thomas Hearns, Wilfred Benítez, Davey Moore, and Roberto Durán. As an amateur, Mugabi won a silver medal in the welterweight division at the 1980 Summer Olympics, and was the only medallist for Uganda at the event.
Document 5: Roy Jones Jr.: Roy Levesta Jones Jr. (born January 16, 1969) is an American professional boxer, boxing commentator, boxing trainer, rapper, and actor who holds dual American and Russian citizenship. He is a six-time former world champion in four weight classes, having held titles at middleweight, super middleweight, light heavyweight, and heavyweight; and is the only boxer in history to start his professional career at light middleweight and go on to win a heavyweight title. As an amateur he represented the United States at the 1988 Summer Olympics, winning a silver medal in the light middleweight division.
Document 6: Sugar Ray Leonard: Ray Charles Leonard (born May 17, 1956), best known as "Sugar" Ray Leonard, is an American former professional boxer, motivational speaker, and occasional actor. Often regarded as one of the greatest boxers of all time, he competed from 1977 to 1997, winning world titles in five weight divisions; the lineal championship in three weight divisions; as well as the undisputed welterweight title. Leonard was part of "The Fabulous Four", a group of boxers who all fought each other throughout the 1980s, consisting of himself, Roberto Durán, Thomas Hearns and Marvin Hagler.
Document 7: Roger Leonard: Roger Leonard (born July 21, 1953) was a professional boxer from Palmer Park, Maryland. He is the older brother of boxing legend Sugar Ray Leonard, who he introduced to boxing.
Document 8: Leon Spinks: Leon Spinks (born July 11, 1953) is an American former professional boxer who competed from 1977 to 1995. In only his eighth professional fight, he won the undisputed heavyweight championship in 1978 after defeating Muhammad Ali via split decision, in what was considered one of the biggest upsets in boxing history. Spinks was later stripped of the WBC title for facing Ali in an unapproved rematch seven months later, which he lost by unanimous decision.
Document 9: The Contender Challenge: UK vs. USA: The Contender Challenge: UK vs. USA was a series of boxing matches on 30 March 2007, held at Metro Radio Arena, Newcastle, England, featuring 6 boxers from the US reality television shows "The Contender" and "The Contender 2". The Contenders, in a team coached by Sugar Ray Leonard, took on 6 boxers from the UK, all promoted by Frank Warren, and coached by Barry McGuigan. The winning team was awarded the "Sugar Ray Leonard Cup," not unlike the Ryder Cup in Golf
Document 10: Ray Mercer: Raymond Anthony "Ray" Mercer (born April 4, 1961) is an American former professional boxer, kickboxer, and mixed martial artist. In boxing he competed from 1989 to 2008, and held the WBO heavyweight title from 1991 to 1992. As an amateur he won a gold medal in the heavyweight division at the 1988 Summer Olympics. As a mixed martial artist, Mercer is known for scoring an upset one-punch knockout victory over former UFC heavyweight champion Tim Sylvia in 2009.
Document 11: Sugar Ray Robinson Award: The "Sugar Ray Robinson Award" (previously known as the Edward J. Neil Trophy) is given to the Boxing Writers Association of America's Fighter of the Year. The BWAA first presented the trophy in 1938. The original purpose of the trophy was to recognize "an individual who did the most for boxing in the previous year." The ** mark indicates the boxer was not active in the year he actually won the award. Over time, the award went strictly to the best fighter of each year as decided by the BWAA. The members of the BWAA vote to decide the best boxer each year regardless of weight class or nationality.
Document 12: Benny Leonard: Benny Leonard (born Benjamin Leiner; April 7, 1896 – April 18, 1947) was an Jewish American professional lightweight boxer. Widely considered one of the all-time greats, he was ranked 8th on "The Ring" magazine's list of the "80 Best Fighters of the Last 80 Years" and placed 7th in ESPN's "50 Greatest Boxers of All-Time". In 2005, the International Boxing Research Organization ranked Leonard as the #1 lightweight, and #8 best pound-for-pound fighter of all-time. Statistical website BoxRec rates Leonard as the 2nd best lightweight ever, while "The Ring" magazine founder Nat Fleischer placed him at #2. Boxing historian Bert Sugar placed him 6th in his Top 100 Fighters catalogue. Leonard is a member of the National Jewish Sports Hall of Fame, the International Jewish Sports Hall of Fame, the Ring Magazine Hall of Fame, the World Boxing Hall of Fame, and the International Boxing Hall of Fame.
Document 13: Tommy Morrison: Tommy David Morrison (January 2, 1969 – September 1, 2013) was an American professional boxer who competed from 1988 to 1996, and held the WBO heavyweight title in 1993. He retired from boxing in 1996 when he tested positive for HIV, but returned for two more fights in 2007 and 2008. Morrison is also known for starring alongside Sylvester Stallone in the 1990 film "Rocky V".
Document 14: Rahman Ali: Rahman Ali (born Rudolph Valentino Clay ; July 18, 1943) is an American former heavyweight boxer. He is the younger brother of the late Muhammad Ali.
Document 15: 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.
ground_truth: "Sugar" Ray Leonard