Will PBF retire undefeated?

[The Rookie Fan]

It is a very hard thing to do. Think it has only been done twice in history. (I'm not counting Sven Otkey)

The most recognized fighters to fight become champs and leave the sport undefeated IMO are;
'Finito' Lopez & Marciano.

You then have other fighters like;
Sven, Simon, Kim, Marsh

Who also retired undefeated and as champs but aren't recognized for such thing for various reasons either short reign/short career, opposition among other things....

CC Mick and ICE. You guys really know your stuff.