Great boxing trainers with no boxing experience?

[Nick Fury]

Has there ever been any good trainers with no fights under there belt or very little to no boxing experience other than training.

[Marcov]

All I can think of without pro fights were at least amateur fighters or trained at one time in a gym themselfs.

[The_Demon]

I know he wasn't a great trainer but Enzo Calzaghe had no boxing background what so ever

[phallus]

al columbo, he trained rocky marciano. columbo never fought or trained himself