What great  boxer formerly known as Cassius Clay along with American former professional boxer and commentator trained at Gleason's Gym?
Muhammad Ali
Gleason's Gym
Gleason's is a boxing gym located on the Brooklyn waterfront.
 Since 1937, when the gym was founded in the Bronx, boxers with their eyes on Olympic glory or a shot at the title have been training at Gleason's.
 Fighters who trained at the gym include Jake LaMotta, Roberto Durán, Benny "Kid" Paret, Paulie Malignaggi, Gerry Cooney, and Mike Tyson.
 Before his first title fight against Sonny Liston, Muhammad Ali, then known as Cassius Clay, also trained at Gleason's.
Paulie Malignaggi
Paul "Paulie" Malignaggi ( ; ; born November 23, 1980) is an American boxing commentator and analyst, and former professional boxer who competed from 2001 to 2017.
 He is a two-weight world champion, having held the IBF junior welterweight title from 2007 to 2008, and the WBA welterweight title from 2012 to 2013.
 Malignaggi was particularly known for his fast hand speed, athleticism, and durable chin.
Shingo Wake
Shingo Wake (和氣 慎吾 , Wake Shingo , born 21 July 1987) is a Japanese professional boxer and former OPBF super bantamweight champion.
 He trained under Satoshi Koguchi at Koguchi Boxing Gym in Tokyo.
 Wake was scouted early by Koguchi, who spotted his talent and persuaded him to move to Tokyo and pursue a boxing career.
 He has since changed boxing gym and now trains at Flare boxing gym.
 A southpaw, Wake is dubbed a "sharp shooter" due to his accuracy and speed in the ring. Sonny Banks
Lucien "Sonny" Banks (June 29, 1940 – May 13, 1965) was an American boxer best known for being the first fighter to drop a young Muhammad Ali (then Cassius Clay).
 At the time Banks was a rising prospect and known for a fast sharp left hook. Muhammad Ali's Greatest Fight
Muhammad Ali's Greatest Fight is a 2013 American television drama film about the late boxer Muhammad Ali's refusal to report for induction into the United States military during the Vietnam War, focusing on how the United States Supreme Court decided to rule in Ali's favor in the 1971 case of "Clay v. United States".
 The film was directed by Stephen Frears, from a screenplay written by Shawn Slovo based on the 2000 book "Muhammad Ali's Greatest Fight: Cassius Clay vs. the United States of America" by Howard Bingham and Max Wallace.
 It premiered on HBO on October 5, 2013. King of the World (film)
King of the World is an American television film which aired on January 10, 2000 on ABC.
 It chronicles the early stages of the career of heavyweight boxer Muhammad Ali (then known as Cassius Clay), who is portrayed by Terrence Howard.
 It is based upon a biography of the same name by David Remnick. Jermell Charlo
Jermell De'Avante Charlo (born May 19, 1990) is an American professional boxer who has held the WBC super welterweight title since 2016.
 His identical twin brother, Jermall Charlo, is also a professional boxer and is older by one minute.
 Both brothers are graduates of Hastings High School in Alief, Houston,Texas.
 They began boxing when they started following their father, a former boxer, into the gym. 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. Imarjoe Miller
Imarjoe Miller (born March 19, 1979) is an American former amateur boxer and current professional boxer in the Light Welterweight division.
 Miller, a late-comer to the sport, went from juvenile delinquency to becoming a pro boxer.
 He is currently trained by Troy Bodean (boxing) at the wildcard boxing gym Roach. Cassius Clay vs. Tunney Hunsaker
Olympic Light heavyweight boxing champion Cassius Clay (later Muhammad Ali) fought Tunney Hunsaker in a six-round match on October 29, 1960.
 Clay won the bout through a unanimous decision on points.
 This was Ali's first fight as a professional.
 Hunsaker was a part time boxer who was for many years a respected police officer in Fayetteville, West Virginia.
 He also helped to train young fighters and he and Ali were friends for many years afterwards.
 In a 1980 Sports Illustrated article, Hunsaker said he didn't agree with Ali refusing to be drafted during the Vietnam war, but he still respected him greatly as a fighter and as a man.