Couple of names come to mind; Dennis Andries was 24 when he turned pro, after having little or no amateur background.

Larry Holmes was 21 years old before he walked into a boxing gym for the first time.

And although he lost a split decision in his WBO Featherweight title shot, John Davidson turned pro 7 days short of his 30th birthday. If my memory serves me right, he had no amateur pedigree, just a history in kickboxing.

Some of the Oriental world title holders, come into the sport relatively late off a kickboxing background as well.