Damn, beaten to it! As Roger says, the Davey Moore of the song was WBC Featherweight champion, who died two days after being knocked out in a title fight, (the site I found gave date of death as 25.3.63). There is another Davey Moore, a welterweight who was fighting in the eighties. If anyone is interested the site here gives an account of the fight, by the Cuban doctor who was one of Ramos's seconds.

No, I'm not a fan of boxing, or have any interest in it, but I can't resist a challenge Barry!

Pete M