Thread by @JeffreyGuterman

Happy birthday to The Greatest. Photo credit: AP. #OTD

Happy birthday to The Greatest. Photo by Charley Pence. #OTD 🥊

Happy birthday, Champ! 🥊

Malcolm X (left) and Cassius Clay (Muhammad Ali) outside the Trans-Lux Theater in New York City on March 1, 1964. Photo credit: AP. #OTD

Remembering Muhammad Ali on his birthday. Photo by John Rooney. #OTD 🥊🥊

Happy birthday, Muhammad Ali. 🎂

Howard Cosell and Muhammad Ali before the start of the Olympic boxing trials on August 7, 1972 in West Point, New York. Photo credit: AP.

Muhammad Ali (born on this date January 17 in 1942) and Coretta Scott King at a news conference on January 10, 1986 in Atlanta to launch a celebration for the first national holiday honoring #MLK. Photo credit: AP. #OTD

Happy birthday, Muhammad Ali. You're the greatest! 🥊🌹❤️

Artwork by Andy Warhol.

Photo by Carl Fischer for Esquire magazine. #OTD

The antiwar movement gained widespread momentum when Muhammad Ali, a paragon of masculinity, refused to fight in Vietnam. #integrity

Happy birthday, Muhammad Ali. Photo credit: AP. @gtconway3d

He gave up his name for what he believed in. He lost his title because he held a conviction. He threw his gold medal in a river only to have the Olympic committee give him another. Muhammad Ali had integrity.

Happy birthday to The Greatest there ever was.

Photo credit: AP.

Happy birthday to The Greatest.

Photo by Michael Probst: Muhammad Ali lights the Olympic flame at the 1996 Summer Olympic Games opening ceremony in Atlanta on July 19, 1996. #OTD

Join me on Twitter Live at 6 PM ET for my two favorite fights by Muhammad Ali: (1) Ali-Foreman in Kinshasa, Zaire (now Democratic Republic of the Congo) on October 30, 1974 and (2) Ali-Frazier III in Cubao, Quezon City, Philippines on October 1, 1975. Photo source: ESPN. 🥊🥊🥊🥊