I inquire into this match-up in order to spark discussion on a more general point.
Fitzsimmons was, most would agree, all-time great fighter. Some consider him to have been the hardest 2-handed hitter, pound-for-pound, who ever lived. [Personally, I accord that honor to Jack Dempsey, but Fitzsimmons is definitely in the conversation.] But he only weighed between 167-172 pounds at his best.
Grant was, most would agree, a solid top ten contender but nowhere near a "great" fighter. But he weighed 250 at his best.
Fitz appears in many all-time heavyweight lists, even unto this day (he finished 20th in the recent IBRO poll). Grant, conversely, appears in none (and rightly so, IMO).
But, could wily Bob, great as he was, even hope to overcome an 80+ pound size disadvantage and defeat the titanic Grant, mediocre though HE was? And if not, should Fitz be placed ahead of Grant (and others of Grant's size & vintage) in all-time HEAVYWEIGHT lists?
I'm not sure of the answer myself, but I would like to hear the thoughts of this board.