Nate Campbell. Two fighters to a lesser extent are that Tony Thompson (who fell over against Wlad not too long ago) and Audley Harrison....
I thought Dan was just talking about fighters who turned pro at a late age, and not counting too much into amateur experience. Your not going to find many great fighters without amateur experience.
no nate was taught the bascis of boxing as a kid, but didnt have his first amature fight until the age of 24
Antonio Tarver and Anthony Mundine both netted World Titles after making their pro debuts in their mid-late 20's.