Question: Cus D'Amato who developed Peek-a-Boo boxing trained boxers who eventually became members of which Hall of Fame?
Context: Beau Jack (born Sidney Walker; April 1, 1921 – February 9, 2000) was an American lightweight boxer and two-time world lightweight champion in the 1940s.  One of the most popular fighters during the War Years, he headlined at Madison Square Garden on twenty one occasions, a record that still stands.  He was considered "The greatest lightweight ever" by Cus D'Amato, famous boxing trainer and manager. Mike Gibbons (July 20, 1887 in St. Paul, Minnesota – August 31, 1956) was an American boxer from 1908 to 1922.  The brother of heavyweight Tommy Gibbons, Mike claimed Middleweight Champion of the World status in 1909 following Stanley Ketchel's murder.  Although he never won the title, Gibbons is regarded as one of the all-time best welter and middleweight boxers by historians.  Statistical boxing website BoxRec lists Gibbons as the #18 ranked middleweight of all time, while "The Ring Magazine" founder Nat Fleischer placed him at #9.  The International Boxing Research Organization rates Gibbons as the 17th best middleweight ever and boxing historian Bert Sugar placed him 92nd in his Top 100 Fighters catalogue.  Gibbons retired due to deteriorating vision.  Following his boxing career he entered business in his native St. Paul, and became a member of the Minnesota Athletic Commission.  Gibbons was elected to the Ring Magazine Hall of Fame in 1958, the International Boxing Hall of Fame in 1992, the World Boxing Hall of Fame in 1997, and the Minnesota Boxing Hall of Fame in 2010. The Ring magazine was established in 1922.  In 1954 the magazine established its own boxing Hall of Fame and inducted 155 members before it was abandoned after the 1987 inductions.  Boxing inductions continue through the International Boxing Hall of Fame.  141 members of the old "The Ring" magazine Hall of Fame have been elected to the International Boxing Hall of Fame since 1989.  The 14 members who have yet to be elected to the International Boxing Hall of Fame are listed below, with their year of induction into the "The Ring" magazine Boxing Hall of Fame: José ("Chegüi") Torres (May 3, 1936 – January 19, 2009) was a Puerto Rican professional boxer.  As an amateur boxer, he won a silver medal in the junior middleweight division at the 1956 Olympic Games in Melbourne.  In 1965, he defeated Willie Pastrano to win the WBC, WBA and lineal light heavyweight championships.  Torres trained with the legendary boxing trainer Cus D'Amato.  In 1997, he was inducted into the International Boxing Hall of Fame. Archie Moore (born Archibald Lee Wright; December 13, 1916 – December 9, 1998) was an American professional boxer and the longest reigning World Light Heavyweight Champion of all time (December 1952 – May 1962).  He had one of the longest professional careers in the history of the sport.  Nicknamed "The Mongoose", and then "The Old Mongoose" in the latter half of his career, Moore holds the record for the most career knockouts (132) in boxing history.  Moore was a highly strategical and defensive boxer, with a great chin and bludgeoning power, he ranks #4 on "The Ring"s list of "100 greatest punchers of all time".  Moore is rated by prominent boxing website BoxRec as the 3rd greatest pound-for-pound boxer of all-time.  Moore was also a trainer for a short time after retirement.  He trained boxers such as Muhammad Ali, George Foreman and James Tillis. Constantine "Cus" D'Amato (January 17, 1908 – November 4, 1985) was an Italian-American boxing manager and trainer who handled the careers of Mike Tyson, Floyd Patterson, and José Torres; all went on to become members of the International Boxing Hall of Fame.  Several successful boxing trainers, including Teddy Atlas, Kevin Rooney, and Joe Fariello, were tutored by D'Amato.  He was a proponent of the peek-a-boo style of boxing, in which the fighter holds his gloves close to his cheeks and pulls his arms tight against his torso.  The style was criticized by some because it was believed that an efficient attack could not be launched from it. 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. Formed in 1963, the Canadian Union of Students (CUS) was the successor organization of the National Federation of Canadian University Students (NFCUS) formed in 1926.  CUS like NFCUS was essentially a binational coalition of student councils at Canadian universities.  Throughout the 1960s, CUS became increasing anti-war and Marxist-inspired, in part as a result of the Student Union for Peace Action especially after it ceased operating in 1966, following the creation of the Company of Young Canadians.  CUS's increasing critique of capitalism and the US war on Vietnam led to a reaction by many CUS members who orchestrated a series of withdrawal referenda.  CUS became non-viable by 1969 and ceased operating.  Canadian students were without a formal national student organization until the National Union of Students (Canada) was formed in 1972.  NUS was the precursor of the Canadian Federation of Students.  Thus the National Federation of Canadian University Students (NFCUS) and the left-wing Canadian Student Assembly (CSA) of the 1930s, to the reformed NFCUS after 1944, to CUS in the sixties, to NUS in the seventies, to CFS of 1981 on, represents a long tradition of national student organizing in Canada. The Cus D'Amato Award, known alternatively as the Boxing Writers of America Manager of the Year Award and previously known as the Al Buck Award from 1967 to 2008, has been conferred annually since 1967 by the Boxing Writers Association of America on the manager, irrespective of nationality or class of fighter represented, adjudged by the membership of the Association to have been the best in boxing in a given year. Peek-a-Boo is a boxing style where the hands are placed in front of the boxer's face, like in the baby's game of the same name.  It offers extra protection to the face and makes it easier to jab the opponent's face.  Peek-a-Boo boxing was developed by legendary trainer Cus D'Amato.
Answer: International Boxing Hall of Fame