Rocky Marciano

Marciano, Rocky (Rocco Marchegiano; 1923–69), U.S. boxer, considered to be one of the most powerful punchers of all time. Marciano won the heavyweight championship by knocking out Jersey Joe Walcott in the 13th round (1952), and successfully defended his title until his retirement in 1956. He is the only major prizefighter to have remained undefeated throughout his professional career, fighting 49 bouts in 9 years, winning 43 by knockout. He was killed in a plane crash.