Rocky Marciano had been a professional boxer for only a little over four years when he defeated Jersey Joe Walcott in Philadelphia. The 29 year old boxer defeated Walcott in a round 13 knockout, after a slow start that saw him behind on points for most of the bout.
Marciano would hold the World Heavyweight Champion title for three and a half years, successfully defending it six times before he retired from professional boxing on April 27, 1956. (Floyd Patterson would be the next holder of the title.)
