Fewest number of fights to become 2 weight world champion.

Naoya Inoue.

8 fights.

 

Holyfield?

I know he became CW champ after about a dozen fights and then moved up and won the HW crown after a handful of fights.

 

Mayweather won his second at 24 fights.

 

Some fighters needed less.

But as it was mentioned, the record is set by Inoue

 

Benitez has to be in the mix l would think.

 

Paul Weir...???

 

Fenech won his 2nd world title in his 16th fight after getting his first strap in his 7th.

 

If a champion in one weight class moves up and becomes champion at another weight hasn't he become 2 weight champion in 2 fights? Dozens have done that

 

edit

 

Eubank and Roy Jones were about 25 fights or so

 

The impressive thing about this, is that it is certainly a complete record!