Don Cockell was a British boxer who won the British and European heavyweight titles. He fought Rocky Marciano for the world title in 1955. He died from cancer. This article needs to be cleaned up to conform to a higher standard of quality. ... Rocco Francis Marchegiano (September 1, 1923 – August 31, 1969), better known as Rocky Marciano, was a boxer who holds the distinction of being the only heavyweight champion to retire undefeated and was commonly known as the Brockton Blockbuster. ... 1955 is a common year starting on Saturday of the Gregorian calendar. ... When normal cells are damaged or old they undergo apoptosis; cancer cells, however, avoid apoptosis. ...