Creedon was born in Invercargill, New Zealand but his boxing career developed in Melbourne, Australia.

Like many of Australia's best boxers of this era, Creedon was taught by boxing pioneers Jem Mace and Larry Foley.

However, a year later he claimed the world title following his victory over Frank Craig in London.

Creedon defended his claim to the title at least twice, but he is not commonly recognized as a middleweight champion by boxing historians.

A benefit was held for him on 26 November 1924, in the Socialist Hall of Melbourne, as he was "in ill health".