Usyk at Heavyweight has lost barely over a dozen rounds.

Chazz Witherspoon - 7 completed rounds, Usyk won 7 of them.
Dereck Chisora - 12 completed rounds, Usyk won 10 of them.
Anthony Joshua - 12 completed rounds, Usyk won 9 of them.
Anthony Joshua II - 12 completed rounds, Usyk won 10 of them.
Daniel Dubois - 8 completed rounds, Usyk won 7 of them.
Tyson Fury - 12 completed rounds, Usyk won 9 of them.
Tyson Fury II - 12 completed rounds, Usyk won 10 of them.

75 completed, 62 victorious if you average out the aggregate of unbiased & knowledgeable fan/pundit/official scorecards. (which gives you almost if not exactly the official IB scorecards™ above)

You're not going to find many better runs than that, among unified champions, looking at their entire campaign in the division. Over just a tad more than half a decade, Usyk managed to win 82.66% (we'll round that off, not too immodestly, to 83%).

Even the great Evander Holyfield, the other "cruiserweight GOAT" candidate who also fought extensively at heavyweight - lost a far higher percentage of rounds...and that's even ignoring his post-prime activities. He won all five rounds against Quick Tillis, and then all seven against Pinklon Thomas - but he lost three by near consensus to Dokes, the fifth round at least to Alex Stewart, 3-4 rounds to Big George, hurt and dropped by Cooper in round three, a few rounds to Holmes, eight or nine to Bowe, two more to Steward, five to Bowe, 6-8 to Moorer, 3-4 to Mercer, four more to Bowe, anywhere between 1 and 5 to Mike Tyson over both contests, 3-4 to Bean, at least thirteen or fourteen to Lewis over 24, about twenty or so to Ruiz over 36, a couple to Rahman, 8-9 to Byrd, and six to James Toney. I'll mercifully spare him including the near-shutout to Larry Donald - we'll say Lights Out beat the last bit of prime outta the Real Deal. That is still - lowballing it, 96 rounds lost at heavyweight pre-Donald. 96, of 254 completed rounds. 38%. More than double Usyk's losing percentage of 17%. Bear in mind that all but two fights of Usyk's at heavyweight were for unified world championships.

Now of course, if you were to hash it out I'm sure his countryman Wladimir Klitschko is going to yield a higher percentage of rounds won - but look at his lengthy reign of subpar competition. There's no way that even Wlad, going against the gauntlet Usyk ran, is posting any better than 83%.

 

Now, if Dubois gets past Joseph Parker he is almost certainly going to claim the grand prize in the Usyk 2025 Sweepstakes - and should he not get stopped, even with his "improvements" of late, I don't see him winning more than a round or two. Meaning that winning percentage will hold steady at 72 of 87, still 83% (assuming Usyk takes a UD in the neighborhood of 118-110 x3, as I predict)

 

Parker, if he scores the mild upset, given the different stylistic look he would pose for Usyk would top out at maybe 4-5 rounds on his best night - meaning he would make a tiny dent but still leave Usyk comfortably above that eighty percent threshold lifelong at heavy.

I don't see The Cat dipping below eighty unless he overstays his welcome competing long after his body starts breaking down (a`la Holyfield's farcical post-Valuev work)

 

I think most people on here would agree that my cards are more reliable than official judges', on average. New guy who's been here since June of last year may not feel the same - but that's a risk I'm willing to take.

 

If anything the OP on paper should flatter to deceive on behalf of Holyfield because it includes a lot of what should have been mismatches (a term you can really only apply to Witherspoon and Chisora from amongst Usyk's heavyweight opponents), where he hemorrhaged an embarrassing number of rounds.

 

Well, my scorecards for all 7 of Usyk's heavyweight contests are identical or within a point's differential of @CST80's - the current main RBR scorer on here. I also have nearly two decades of scoring the majority of televised boxing matches under my belt, and like I said - my reputation speaks for itself, regardless of one newb's takeaway based on a small sampling of seven contests.

But by all means, educate me on which of those seven contests you think are so clearly "biased" as to be less reliable than the official verdicts.

Starting with his most recent one - are you of the mind that Fury clearly won more than just two rounds? Because he didn't, and you can only make a ghost of a case for him in up to four. Much like Joshua, he performed "better" according to most based on eye test in his rematch than in his initial encounter with Usyk - but they both earned one clear round fewer in their respective rematches.

 

Actually just looked, and @CST80 had Usyk beating Chisora 119-109 (along with the same 7-0 vs. Witherspoon as of the stoppage, and identical cards to mine in both of the Fury fights and the Joshua rematch - plus 118-110 instead of my 117-111, so a point wider in the first AJ match) meaning on his scorecards, Usyk has only lost eleven rounds total at heavyweight.

 

I don't think you're successfully making the point you want to. If we're bringing opponent quality into play, then it absolutely matters that Holyfield lost a bunch of rounds to sub-elite guys like Stewart, Cooper, and Dokes. You don't get to just cherry-pick an apples to apples comparison of their seven biggest wins and then say Holy losing rounds against mediocrities means nothing. Usyk faced two non-champs at HW - Chazz and Dereck - and won 17 of 19 rounds against them. Better percentage than Holyfield against non-champs, as well as against champs.

 

What on earth...? Five apiece.