Question: Johnny Buckley is a legendary Irish boxing manager and promoter from Boston, he guided which American world heavyweight boxing champion, to world boxing titles?

Context paragraphs:
Blair Richardson: Blair Richardson (29 January 1941 – 6 March 1971) was a Canadian professional light middle/middle/light heavyweight boxer of the 1950s and 1960s who won the Maritime Middleweight Title, Canada middleweight title, and Commonwealth middleweight title, his professional fighting weight varied from 154 lb , i.e. middleweight to 167 lb , i.e. light heavyweight, he was managed by Jimmy Nemis, Johnny Buckley, Johnny Buckley Jr., and trained by Al Lacey, Charlie Pappas, and Johnny Sullo.  Richardson was an alumnus of Emerson College, Boston, Massachusetts where he gained bachelor and master of science degrees in speech (minors in sociology and theology), after his retirement from boxing, he taught speech and the finer points of boxing at Northeastern University, Boston, Massachusetts for two years before joining the faculty at Emerson College in 1970, he was also a member of the Fellowship of Christian Athletes, and several speech organizations, he died at New England Deaconess Hospital in Boston, Massachusetts following surgery for a brain tumor.

Crawford Ashley: Crawford "Chilling" Ashley (born Gary Crawford, 20 May 1964 in Leeds is an English professional super middle/light heavy/cruiser/heavyweight boxer of the 1980s, '90s and 2000s, who won the British Boxing Board of Control (BBBofC) Central Area light heavyweight title, BBBofC British light heavyweight title, European Boxing Union (EBU) light heavyweight title (twice), and Commonwealth light heavyweight title (twice), drew with Yawe Davis for the vacant European Boxing Union (EBU) light heavyweight title, and was a challenger for the European Boxing Union (EBU) light heavyweight title against Graciano Rocchigiani, World Boxing Association (WBA) World super middleweight title against Michael Nunn, World Boxing Association (WBA) World light heavyweight title against Virgil Hill, and World Boxing Union (WBU) cruiserweight title against Sebastiaan Rothmann, his professional fighting weight varied from 163 lb , i.e. super middleweight to 211 lb , i.e. heavyweight.

Philadelphia Jack O'Brien: Joseph Francis Hagan (better known as Philadelphia Jack O'Brien) (January 17, 1878 – November 12, 1942) was the world light heavyweight boxing champion.  Nat Fleischer, founder and editor of "The Ring" Magazine, ranked O'Brien as the No. 2 All-Time Light Heavyweight, and famed boxing promoter Charley Rose ranked him as the No. 3 All-Time Light Heavyweight.  O'Brien was inducted into the Ring Magazine hall of fame in 1968, the World Boxing Hall of Fame in 1987, and the International Boxing Hall of Fame in 1994.

Garry Delaney: Gary Delaney ( (1970--) 12 1970 (age (2017)-(1970)-((11)<(08)or(11)==(08)and(30)<(12)) ) ) born in Newham is an English professional light heavy/cruiser/heavyweight boxer of the 1990s and 2000s.  He won the British Boxing Board of Control (BBBofC) Southern Area light heavyweight title, World Boxing Board (WBB) light heavyweight title, World Boxing Organization (WBO) Inter-Continental light heavyweight title, BBBofC Southern Area cruiserweight title, and Commonwealth light heavyweight title (twice), and was a challenger for the BBBofC British heavyweight title, and Commonwealth heavyweight title against Julius Francis, World Boxing Organization (WBO) Inter-Continental cruiserweight title against John Keeton, and Jesper Kristiansen, BBBofC British cruiserweight title, and Commonwealth (British Empire) cruiserweight title against Bruce Scott, and World Boxing Union cruiserweight title against Sebastiaan Rothmann, and Enzo Maccarinelli, his professional fighting weight varied from 174 lb , i.e. light heavyweight to 231 lb , i.e. heavyweight.

Johnny Pritchett: Johnny Pritchett (born 15 February 1943) is an English amateur welterweight and professional light middle/middle/light heavyweight boxer of the 1960s and '70s, and boxing manager of the 1970s and '80s, who as an amateur won the Amateur Boxing Association of England (ABAE) 1959 Junior Class-A title against B. Ford (St Peters ABC), boxing out of Bingham & District ABC, won the 1962 Amateur Boxing Association of England welterweight title, against Harry Dean (Oxford YMCA), boxing out of Bingham & District ABC, won the 1963 Amateur Boxing Association of England welterweight title, against Ralph Charles (West Ham ABC), boxing out of Bingham & District ABC, and represented England and won the silver medal at welterweight in the Boxing at the 1962 British Empire and Commonwealth Games in Perth, Australia, losing to Wallace Coe of New Zealand, and as a professional won the British Boxing Board of Control (BBBofC) British middleweight title, and British Commonwealth middleweight title, and was a challenger for the European Boxing Union (EBU) middleweight title against Juan Carlos Durán, his professional fighting weight varied from 153+1/4 lb , i.e. light middleweight to 162+1/2 lb , i.e. light heavyweight.  Johnny Pritchett managed; Dave Needham, Howard Hayes, Johnny Cheshire, and Dave Symonds.

Johnny Buckley: Johnny Buckley is a legendary Irish boxing manager and promoter from Boston, Massachusetts mostly during the first half of the 20th century who has handled some of the most famous boxers in the world including 3 World Champions.  He guided Jack Sharkey, Lou Brouillard and Paul Pender to world boxing titles.  Buckley is a member of the World Boxing Hall of Fame.

Jack Johnson (boxer): John Arthur "Jack" Johnson (March 31, 1878 – June 10, 1946), nicknamed the Galveston Giant, was an American boxer, who—at the height of the Jim Crow era—became the first African American world heavyweight boxing champion (1908–1915).  Johnson went on to become one of the most dominant champions of his time, and remains a significant historical figure in heavyweight boxing history, with his 1910 fight against James J. Jeffries being dubbed the "fight of the century."  Johnson was faced with much controversy when he was charged with violating the Mann Act in 1912, even though there was an obvious lack of evidence and the charge was largely racially based.  In a documentary about his life, Ken Burns notes that "for more than thirteen years, Jack Johnson was the most famous and the most notorious African-American on Earth".

Frank Goddard: Percy Frank Goddard (27 November 1891- 8 December 1957) was a British boxer who became the heavyweight boxing champion in 1923.  Goddard's career begin in 1914 and it soon became apparent that he was one of the best boxers in the UK.  He became the British heavyweight boxing champion on 26 May 1919 having beaten Jack Curphey for the vacant British Boxing Board of Control (BBBofC) British heavyweight title.  Goddard lost the British heavyweight championship on 17 June 1919 to Joe Beckett.

Jack Sharkey: Jack Sharkey (Lithuanian: "Juozas Povilas Žukauskas" , October 26, 1902 – August 17, 1994) was an American world heavyweight boxing champion.  He was born Joseph Paul Zukauskas (his birth surname is sometimes given as Cukoschay), the son of Lithuanian immigrants, in Binghamton, New York but moved to Boston, Massachusetts as a young man.  Sources report little of his early life until, at the outset of the First World War, teenaged Joseph repeatedly tried to enlist in the Navy.  Turned down because of his age, he was not able to enlist until after the end of the war.

Adam Watt: Adam Keith Watt (born 10 November 1967) is an Australian former boxer and kickboxer.  He has studied kickboxing, Seido-kaikan karate, and boxing.  His nickname was "Lights Out" because of his high level karate and boxing skills, and one punch knock out power.  He has won many world kickboxing titles, and reached as high as 10th in the highly respected World Boxing Council's & World Boxing Organisation's (W.B.C & WBO) Cruiserweight ratings.  Becoming the first person in the world to ever fight for world Karate, Kickboxing and Boxing Titles.

Supporting paragraphs: Johnny Buckley Jack Sharkey
Answer: Jack Sharkey