Who is the best undefeated fighter ever?

[studentofthegam]

No love for Joe Calzaghe?

I like Joe. Floyd's the proper answer active or not.

[D4thincarnation]

Joe Calzaghe, won all the belts, undisputed champ and won ring titles at two weights.

Took on great fighters and beat them.

[tennishero]

castillo beat mayweather

he has no right in this list

marciano fought everyone put in front of him but he was very lucky that everyone was shot by the time he got in

ali 1962-1967 was undefeated and a different fighter to the one who came after

if lennox wasn't a complete idiot he coulda ended his career undefeated
vitali has never really lost a fight

[MrClutch85]

Rocky Marciano he's one of the greatest Heavyweights of all time top 12