Michael Spinks (born July 13, 1956) is an American former professional boxer who competed from 1977 to 1988. He held world championships in two weight classes, including the undisputed light heavyweight title from 1983 to 1985, and the lineal heavyweight title from 1985 to 1988. As an amateur he won a gold medal in the middleweight division at the 1976 Summer Olympics.

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Michael Gerard Tyson (born June 30, 1966) is an American former professional boxer who competed from 1985 to 2005. He reigned as the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title at 20 years, four months and 22 days old

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Joseph William Calzaghe, CBE (/kælˈzæɡi/ kal-ZAH-gee; born 23 March 1972) is a Welsh former professional boxer who competed from 1993 to 2008. He held world championships in two weight classes, including the unified WBA (Super), WBC, IBF, WBO, Ring magazine and lineal super-middleweight titles, and the Ring light-heavyweight title.[1]

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**NEW SERIES**

Welcome to the first installment of our new series "Career Profiles" in which Sean & Johnston will breakdown the profiles of some of the greatest fighters in boxing history.

What better way to start than with "The Greatest" Muhammad Ali as they breakdown his amateur and professional accomplishments along with all the stories of life outside the ring.

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