Boxers winning 100 or more fights seem to be over. The days of the boxers losing 100 or more fights are still happening. Only 10 active with 50 or more wins.

Boxing Historian Henry Hascup supplied the winners, Ken Hissner the losers and along with boxers active with 50 or more wins.

The top 12 winners are:
Len Wickwar, 340-87-43, Leiceste, UK
Wildcat Monte, 265-66-34, Wichita Falls, TX
Harry “Pittsburgh Windmill” Greb, 262-17-18, Pittsburgh, PA
Bill Bird, 260-73-20, Chelsea, London, UK
Young “King of the Canebrakes” Stribling, 256-16-17, Macon, GA
Jack Britton, 237-60-43, Clinton, NY
Ted “The Aldgate Sphinx” Kid Lewis, 230-46-23, St. George’s, London, UK
Willie “Will o’ the Wisp” Pep, 229-11-1, Rocky Hill, CT
Maxie “Slapsie Maxie” Rosenbloom, 224-44-28, New York, NY
Sam “The Boston Bonecrusher” Langford, 211-44-53, Boston, MASS
Freddie Miller, 210-30-7, Cincinnati, OH
George Rose, 208-38-4, Bristol, UK

The Top 12 Losers:
Kristian ‘Mr. Reliable’ Laight, 12-279-9, Nuneaton, UK
Reggie “Raglin” Strickland, 66-276-17, Indianapolis, IND
Kevin McCauley, 15-224-12, Stourbridge, UK (active)
Jason Nesbitt, 10-198-4, Birmingham, UK
Tiger Bert Ison, 116-184-40, Leicester, UK
Ibrar ‘Smokin’ Riyaz, 6-180-4, Reading, UK
Arnold “Kid” Sheppard, 98-172-39, Ferndale, Wales
Simmie “Spider” Black, 33-170-3, Little Rock, ARK
Donnie “The Spoiler” Penelton, 13-167-6, Milwaukee, WI
William ‘Warby’ Warburton, 27-164-10, Atherton, UK
Delroy Spencer, 14-156-3, Wolverhampton, UK

Active 10 with 50 or More Wins:
Roy Jones, Jr., 66-10, Pensacola, FL
Miguel “Mickey” Roman, 65-14, Ciudad Juarez, MEX
Krzysztof “Diablo” Wlodacrzyk, 61-4-1, Warsaw, POL
Saul “Canelo” Alvarez, 59-2-2, Guadalajara, MEX
Newaphon Kaikanha, 58-2-1, Bangkok, TH
Rene Huebner, 54-19-2, Berlin, GER
Firat Arslan, 53-9-3, Suessen, GER
Robin Krasniqi, 52-7, Gersthofen, GER
Roman “Chocolatito” Gonzalez, 51-4, Managua, NIC
Wisaksil Wangek, 51-6-1, Si Sa Ket, TH

I could add Bheki Moyo 0-73-2 from Zim/Uk retired and active boxer Genadij Kravenski, ROM 0-51