It sounds like the OP is referencing a book, but I found an article that seems to fit the bill:
The boxers Olajide looks at do make a strange list - does anyone seriously consider Marciano in GOAT discussions? Holyfield? He also makes strange statements about how cross-weight matchups might actually go - "Imagine Leonard vs. Ali!'. I think most, myself included, think it's a pointless exercise to imagine a HW Duran or a MW Louis.
He does mention that he's only working with people with whom he has good film.
Anyway, a strange approach as resume is rarely mentioned. It's mostly a styles discussion of modern greats with a couple of big name HW's thrown in.
An odd way to end: "And why didn’t he [RJJ] ever have a nickname? That always bothered me." Agree with the OP in that it is a strange piece.