Muhammad Ali was born Cassius Marcellus Clay on January 17, 1942, in Louisville, Kentucky. Unlike most future champions, his parents, Cassius and Odessa (Grady) Clay, were middle-class and he lived in the respectable part of town. His father was a sign and mural painter, and his mother was a domestic. Sundays, the family, including younger brother Rudolph (now Rahaman Ali), would troop to the Mount Zion Baptist Church, and weekdays he attended DuValle Junior High School, and then Central High School. Ali was never a good student, and he confessed in later years that he has always been a slow reader.
Young Muhammad Ali
At the age of 12, a curious incident set young Cassius Clay on a new path. On an October afternoon he rode his new bike to the Columbia Auditorium. Later, when he went back to get it, it had been stolen. Someone told him there was a police officer in the basement, so Clay went down there. The basement turned out to be a boxing gym—the officer, Joe Martin, was a boxing enthusiast with his own gym. After listening to his volley of threats against whoever stole the bike, Martin invited him to come around to his gym and learn something about boxing.
Six weeks after he started training with Joe Martin, Clay fought and won his first bout. Over the next few years of his training, Martin became more and more impressed, not only with Clay's speed and strength, but even more by his mental quickness and his ability to take a punch without the twin dangers of getting mad or going into a panic. In high school, Clay became a very successful amateur boxer, winning six Kentucky Golden Gloves Championships and two nationals. By the time he graduated, he had 100 wins and only 8 losses. Throughout the 1950s, he also appeared on a local television program Tomorrow's Champions. He was paid four dollars for each televised match. Then, shortly after graduation, he won a gold medal at the 1960 Rome Olympics in light-heavy-weight boxing. He decided to turn pro.
Almost immediately, Clay signed one of the most lucrative contracts in boxing history, which guaranteed a 50/50 split in his earnings with eleven Kentucky millionaires known as the Louisville Sponsoring Group. He hired Angelo Dundee as his first professional trainer, and easily dispatched his opponent, Tunney Hunsacker, in his first professional match, on October 29, 1960. The purse was $2,000. Over the next 4 years he fought and won 19 professional matches, but it wasn't this alone that made him a heavyweight contender.
Early on, Cassius Clay mastered the fine art of publicity. At the Olympics he began inventing rhymes that predicted how he would do in a match, and he brought this skill home with him. Before long he was something of a media darling, dismissed by some as "The Louisville Lip," but always good for sports copy. He understood the value of that attention, and as he told Sports Illustrated in 1964, "If you wonder what the difference between [other boxers] and me is, I'll break the news: you never heard of them. I'm not saying they're not good boxers.… I'm just saying you never heard of them." Before long, people were clamoring for a Cassius Clay shot at the heavyweight title.
Before long, Sonny Liston bowed to the pressure and agreed to fight Clay in Miami. In the weeks leading up to the match, Clay turned up the volume on the traditional hype, rhyming and hurling insults at Liston. About this time, he began using the chant "float like a butterfly, sting like a bee." And on February 25, 1964, backed up his talk by defeating the "unbeatable" Sonny Liston. At 22, Cassius Clay was the World Heavyweight Champion

A Controversial Champ Something else happened in Miami in 1964. Inspired by Malcolm X, Cassius Clay joined the Nation of Islam, and renounced his "slave name" in favor of Muhammad Ali, "Beloved of Allah." The name had been personally bestowed upon him by Elijah Muhammad, founder of the Nation of Islam. Realizing how this would affect people's view of him, he kept his conversion secret before the match, fearing the news might cost him his shot at the title. But soon after the fight, he went public with the news.
For many Americans this seemed like some kind of betrayal. Black Muslims were often feared and hated, as radicals, as dangerous, as un-American. And now the heavyweight champ, the beloved Cassius Clay was one of them. Or rather Muhammad Ali, a name that sounded foreign, maybe subversive, to Americans in the 1960s. And then Muhammad Ali came out against the Vietnam War, refusing to even consider going over there if he was drafted. Ali's remarks caused a national uproar. In April of 1967, when he refused induction into the U.S. Army, on religious grounds, politicians and veterans groups called for his imprisonment. In fact, he was arrested and ultimately sentenced to five years in prison, but he was freed pending appeal. Then boxing officialdom stepped in. The World Boxing Association stripped him of his heavyweight title, and the New York State Athletic Commission banned him from boxing. Every other state commission soon joined them. Muhammad Ali was suddenly out of a title and out of a job.
| 1942 | Born Cassius Marcellus Clay, January 17, in Louisville, Kentucky |
| 1954 | Begins boxing |
| 1960 | Wins gold medal, Rome Olympics, light-heavyweight boxing |
| 1960 | First professional boxing match, defeats Tunney Hunsacker, October 29 |
| 1963 | Converts to Islam, inspired by Malcolm X |
| 1964 | Takes World Heavyweight Championship from Sonny Liston |
| 1964 | Announces name change, to Muhammad Ali |
| 1964 | Marries Sonji Roi |
| 1966 | Divorces Sonji |
| 1966 | Refuses to go to Vietnam |
| 1967 | Stripped of boxing license and heavyweight title by New York State Athletic Commission and World Boxing Association, May |
| 1967 | Convicted of draft-dodging, sentenced to five years in prison (but released on appeal) |
| 1967 | Marries Belinda Boyd |
| 1970 | Conviction overturned |
| 1970 | Returns to the ring, against Jerry Quarry, November |
| 1971 | Loses to Joe Frazier in title match, February |
| 1974 | Beats Joe Frazier in rematch, becomes World Heavyweight Champion again |
| 1974 | Defeats George Foreman in "Rumble in the Jungle" to become World Heavyweight Champion again |
| 1975 | Defeats Joe Frazier again in "Thrilla in Manilla," often considered the greatest boxing match ever |
| 1976 | Divorces Belinda |
| 1977 | Marries Veronica Proche |
| 1978 | Loses title to Leon Spinks |
| 1978 | Reclaims title from Leon Spinks in rematch |
| 1979 | Retires from professional boxing |
| 1980 | Returns to professional boxing, loses to Larry Holmes in WBC title match |
| 1981 | In last professional boxing match, loses to Trevor Berbick |
| 1982 | Diagnosed with Parkinson's Disease |
| 1985 | Visits Lebanon in attempt to secure release of hostages, February |
| 1985 | Founds World Organization for Right, Liberty and Dignity (WORLD) |
| 1985 | Divorces Veronica |
| 1986 | Marries Yolanda "Lonnie" Williams |
| 1990 | Visits Iraq in successful attempt to secure release of American hostages |
| 1996 | Chosen to light Olympic Torch in Atlanta |
| 2000 | Wins WBA title from John Ruiz |
| 2001 | Establishes Muhammad Ali Center, Louisville, Kentucky |