Constantine "Cus" D'Amato (January 17, 1908 – November 4, 1985) was an American boxing manager and trainer who handled the careers of Floyd Patterson, José Torres, Vinnie Ferguson, and Mike Tyson. Several successful boxing trainers, including Teddy Atlas, Kevin Rooney, and Joe Fariello, were tutored by D'Amato. He is known for developing a "peek-a-boo" style in which the fighter holds his hands high in front of his face.

D'Amato was born into an Italian family in the Bronx, New York on January 17, 1908.

When he was 22, he opened the Empire Sporting Club with Jack Barrow at the Gramercy Gym. D'Amato lived in the gym for years. According to D'Amato, he spent his time at the gym waiting for a "champion," but his best fighters would routinely be poached by "connected" managers. One fighter discovered by D'Amato was Rocky Graziano, who signed with other trainers and managers and went on to become middleweight champion of the world.

D'Amato also confronted boxing politics, and decided, along with his friend Howard Cosell, to thwart the International Boxing Club of New York (IBC). Suspicious to the point of paranoia, D'Amato refused to match his fighter in any bout promoted by the IBC. The IBC was eventually found to be in violation of anti-trust laws and was dissolved.^{[dead link]}

Amato (Greek: Amathous) is a comune and town in the province of Catanzaro in the Calabria region of Italy.

Amato is one of the oldest towns in Calabria. It is mentioned by the Greek philosopher Aristotle, who calls it "Portus Amati Fluminis" (harbour of the Amato River). It is also mentioned by the Roman Pliny the Elder in one of his books. He calls it "Sinus Lametinus" (Lametino Harbour).

It appears that the people of Amato originated from the ancient city of Lametia, on the promontory of the Gulf of Sant'Eufemia, near the mouth of the Amato River. It was one of the most thriving cities of old Calabria, which at that time was called Bruttium.

From an English publication entitled "Brief History of Amato", we learn that Amato existed many years before the foundation of Rome. From this book we also learn that at that time Amato was very industrious and had a population of about 20,000 people. Its economy was centered around the very important textile industry, with about 1300 looms at work. In fact even up to a few years ago many Amatese women had a loom and many of them were very capable weavers. Production of the silkworm was also a very popular activity.

Michael Gerard "Mike" Tyson (born June 30, 1966) is a retired American professional boxer. Tyson is a former undisputed heavyweight champion of the world and holds the record as the youngest boxer to win the WBC, WBA and IBF heavyweight titles at 20 years, 4 months and 22 days old. Tyson won his first 19 professional bouts by knockout, with 12 of them occurring in the first round. He won the WBC title in 1986 after defeating Trevor Berbick by a TKO in the second round. In 1987, Tyson added the WBA and IBF titles after defeating James Smith and Tony Tucker. He was the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to individually unify them.

In 1988, Tyson became the lineal champion when he knocked out Michael Spinks in the first 91 seconds of the fight. Tyson successfully defended the world heavyweight championship nine times, including victories over Larry Holmes and Frank Bruno. Tyson lost his titles to 42-to-1 underdog James "Buster" Douglas on February 11, 1990, in Tokyo, Japan, by a knockout in round 10. Tyson continued in his quest to regain the titles, defeating Donovan Ruddock twice in 1991. Tyson was then scheduled to take on the undisputed heavyweight champion Evander Holyfield but pulled out due to injury.

Muhammad Ali (born Cassius Marcellus Clay, Jr.; January 17, 1942) is an American former professional boxer, philanthropist and social activist. Considered a cultural icon, Ali was both idolized and vilified.

Originally known as Cassius Clay, Ali changed his name after joining the Nation of Islam in 1964, subsequently converting to Sunni Islam in 1975, and more recently practicing Sufism.^{[clarification needed]} In 1967, three years after Ali had won the World Heavyweight Championship, he was publicly vilified for his refusal to be conscripted into the U.S. military, based on his religious beliefs and opposition to the Vietnam War. Ali stated, "I ain't got no quarrel with them Viet Cong... No Viet Cong ever called me nigger" – one of the more telling remarks of the era.

Widespread protests against the Vietnam War had not yet begun, but with that one phrase, Ali articulated the reason to oppose the war for a generation of young Americans, and his words served as a touchstone for the racial and antiwar upheavals that would rock the 1960s. Ali's example inspired Martin Luther King Jr. – who had been reluctant to alienate the Johnson Administration and its support of the civil rights agenda – to voice his own opposition to the war for the first time.

A.k.a. Cassius Clay (styled as a.k.a. Cassius Clay) is a 1970 boxing documentary film about the former heavyweight champion Muhammad Ali.

Directed by Jimmy Jacobs, the film was made during Ali's exile from the sport for refusing to be inducted into the US Army on religious grounds. Narrated by Richard Kiley, the film gives an overview of Ali's career to that point. The film features archive footage of people associated with Ali, such as Angelo Dundee, Malcolm X, and Drew Bundini Brown, and clips of his fights with Sonny Liston, Henry Cooper, George Chuvalo and Floyd Patterson. These are intercut with scenes featuring Ali and veteran boxing trainer Cus D'Amato discussing his career and how he would have fared against past champions such as Joe Louis.