"0-0" - zero defeats, zero draws. For example: Larry Holmes (48-0-0) vs Michael Spinks (27-0-0) 75 Tyson Fury (27-0-0) vs Deontay Wilder (40-0-0) 67 Mike Tyson (34-0-0) vs Michael Spinks (31-0-0) 65 Mike Tyson (30-0-0) vs Tony Tucker (34-0-0) 64 Muhammad Ali (31-0-0) vs Joe Frazier (26-0-0) 57
Joe Calzaghe (40-0-0) vs Jeff Lacy (21-0-0) Joe Calzaghe (43-0-0) vs Mikkel Kessler (39-0-0) Baws, ignore this, OP says HW!
Josh Taylor recent run is pretty much all these types - I think since afetr Postol every opponent he faced was 0-0 and even Postol only had a single defeat to Bud Crawford:- Ryan Martin : 22-0-0 Ivan Baranyck : 19-0-0 Regis Prograis : 24-0-0 Apinun Kongsong : 16-0-0 Jose Ramirez : 26-0-0 And next up : Jack Catterall : 26-0-0 Of course, Barancyk was where Taylor won his first title, but still a cracking run! And again, not HW, so ignore, but might be interesting nuggets in any case for folks not just interested in HW. Reading comprehension FTW!
Tyson vs Tucker 30-0-0 vs 34-0-0 Tyson vs Biggs 31-0-0 vs 15-0-0 Tyson vs Spinks 34-0-0 vs 31-0-0 Foreman vs Frazier 37-0-0 vs 29-0-0 Holmes vs Ocasio 29-0-0 vs 13-0-0 Holmes vs Snipes 38-0-0 vs 22-0-0 Holmes vs Cooney 39-0-0 vs 25-0-0 Holmes vs Witherspoon 42-0-0 vs 15-0-0 Holmes vs Frazier 44-0-0 vs 10-0-0 Holmes vs Bey 46-0-0 vs 14-0-0 Holmes vs Williams 47-0-0 vs 16-0-0
Felix Trinidad 38-0-0 vs Fernando Vargas 20-0-0.. every heavyweight fight has damn near been mentioned
Valuev vs Nobles 38-0-0 vs 25-0-0 Does Brian Nielsen 38-0-0 vs Don Steele 41-0-0 for the IBO belt count? that's 79