The Rock retires with a perfect record (49-0)
April 27, 1956
The Brockton Blockbuster is through busting heads -- and ribs. Rocky Marciano, 32, announces his retirement from boxing. At 49-0 (with 43 knockouts), he is the only heavyweight champion to finish his career undefeated.
Marciano, who started boxing professionally in 1947 and gained the heavyweight crown in 1952 by knocking out Jersey Joe Walcott, doesn't expect to be making a comeback, like former champs Jim Jeffries and Joe Louis did.
"No man can ...
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