Records G-M
| Name | Team | First/last bout in database | Record |
| Golovkin Gennadiy | KZK | 2000-2005 | partial record (44-8) |
| Horta Adolfo | CUB | 1970-1986 | partial record (119-23) |
| Korobov Matvey | RUS | 1998-2008 | partial record (85-8) |
| Korolev Nikolay | URS | 1936-1954 | partial record (40-7) |
| Kovacs Istvan | HUN | 1988-1997 | partial record (78-11) |
| Laffita Andry | CUB | 1995-2010 | partial record (108-48) |
| Murach Michael | GER | 1934-1941 | partial record (36-11) |
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