Muhammad Ali was the 4th heavyweight champions to retire while still holding the title. Who were the previous three?

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posted Feb 21, 2017 by Anushka

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Rocky Marciano, Jim Jefferies and Gene Tunney

commented Feb 27, 2017 by Abu Anam

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+1 vote

Rocky Marciano, Jim Jefferies and Gene Tunney.

answer Apr 17, 2017 by Sagar Sharma

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