Legendary boxer Muhammad Ali is considered by many to be one of the greatest heavyweight boxers of all time. His accomplishments in the ring were as great as his philanthropic and civil rights achievements. Ali died June 3 at age 74
"Float like a butterfly. Sting like a bee. You can't hit what your eyes don't see." – Muhammad Ali
Born Cassius Marcellus Clay Jr., Jan. 17, in Louisville, Ky.
After 12-year-old Cassius Clay's bicycle is stolen, he meets Joe Martin, a policeman who trained young boxers.
"Impossible is just a word thrown around by small men who find it easier to live in the world they've been given than to explore the power they have to change it. Impossible is not a fact. It's an opinion. Impossible is potential. Impossible is temporary. Impossible is nothing." – Muhammad Ali
Wins the light heavyweight Golden Gloves novice championship.
Wins Golden Gloves Tournament of Champions and the Amateur Athletic Union's national title.
"It's hard to be humble when you're as great as I am." – Muhammad Ali
Wins the light heavyweight gold medal at the Rome Olympics; a month later, he wins his first fight as a pro against Tunney Hunsaker.
"The crowd did not dream when they laid down their money that they would see a total eclipse of the Sonny!" – Muhammad Ali
Feb 25, 1964
Wins heavyweight title for first time by knocking out Sonny Liston. Joins the Nation of Islam shortly after.
"I wish people would love everybody else the way they love me. It would be a better world." – Muhammad Ali
Mar 6, 1964
Changes his name from Cassius Clay to Muhammad Ali.
Ali defeats Liston again.
"When I feel pain, that's when I start counting, because that's when it really counts." – Muhammad Ali
Conscientiously objects to serving in the Vietnam War.
"How tall are you? So I can know in advance how far to step back when you fall down!" – Muhammad Ali
April 28, 1967
Refuses induction into the Army, is stripped of his boxing titles and banned from competing for three years.
March 22, 1967
Ali defeats Zora Folley.
"Silence is golden when you can't think of a good answer." – Muhammad Ali
Oct 26, 1970
Returns to the ring in Atlanta and defeats Jerry Quarry.
"We become heroes when we stand up for what we believe in." – Muhammad Ali
Jun 28, 1971
Supreme Court overturns Ali's conviction, rules he was not guilty of evading war.
Mar 8, 1971
Loses a 15-round decision to Joe Frazier in what is tabbed "The Fight of the Century."
Defeats Floyd Patterson in a rematch.
"If my mind can conceive it, and my heart can believe it—then I can achieve it." – Muhammad Ali
Jan 28, 1974
Defeats Frazier at Madison Square Garden.
"Not only do I knock them out, I pick the round!" – Muhammad Ali
Oct 30, 1974
Regains heavyweight title by defeating George Foreman in the "Rumble in the Jungle" in Kinshasa, Zaire.
"The Champ should be pretty like me!" – Muhammad Ali
Oct 1, 1975
Beats Frazier to retain title in the "Thrilla in Manila."
"I should be a postage stamp. That's the only way I'll ever get licked." – Muhammad Ali
Feb 15, 1978
Loses title to Leon Spinks but wins it for the third and final time exactly seven months later.
Dec 11, 1981
Loses to Trevor Berbick; retires two days later at 39.
Inducted into the Olympic Hall of Fame.
"I've handcuffed lightning, thrown thunder in jail!" – Muhammad Ali
Says he has Parkinson's disease.
Negotiates the release of 14 U.S. hostages from Iraq.
July 19, 1996
Lights the Olympic flame for the Summer Games in Atlanta.
"Service to others is the rent you pay for your room here on earth." – Muhammad Ali
Named U.N. Messenger of Peace for humanitarian work.
Named Sports Illustrated's Sportsman of the Century, BBC Sports Personality of the Century.
Nov. 9, 2005
Awarded the Presidential Medal of Freedom by George W. Bush.
June 3, 2016
Ali dies at age 74.
"I don't have to be what you want me to be." – Muhammad Ali