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| Champion | Won | Lost | Days |
|---|---|---|---|
| Floyd Schofield | 10 Oct 2026 | Current | 10 |
| Gervonta Davis | 29 Nov 2023 | 16 Jan 2026 | 779 |
| Devin Haney | 5 Jun 2022 | 29 Nov 2023 | 542 |
| George Kambosos Jr. | 27 Nov 2021 | 5 Jun 2022 | 190 |
| Teófimo López | 17 Oct 2020 | 27 Nov 2021 | 406 |
| Jorge Linares | 24 Sept 2016 | 13 May 2018 | 596 |
| Anthony Crolla | 21 Nov 2015 | 24 Sept 2016 | 308 |
| Nate Campbell | 8 Mar 2008 | 10 Jan 2009 | 308 |
| Juan Díaz | 17 Jul 2004 | 23 Feb 2007 | 951 |
| Leonard Doroftei | 5 Jan 2002 | 24 Oct 2003 | 657 |
| Raul Horacio Balbi | 18 Oct 2001 | 5 Jan 2002 | 79 |
| Takanori Hatakeyama | 11 Jun 2000 | 1 Jul 2001 | 385 |
| Gilberto Serrano | 13 Nov 1999 | 11 Jun 2000 | 211 |
| Jean Baptiste Mendy | 16 May 1998 | 10 Apr 1999 | 329 |
| Orzubek Nazarov | 30 Oct 1993 | 16 May 1998 | 1,659 |
| Tony Lopez | 24 Oct 1992 | 26 Jun 1993 | 245 |
| Pernell Whitaker | 11 Aug 1990 | 20 Apr 1992 | 618 |
| Edwin Rosario | 9 Jul 1989 | 4 Apr 1990 | 269 |
| Julio César Chávez | 21 Nov 1987 | 1 Jun 1989 | 558 |
| Edwin Rosario | 26 Sept 1986 | 21 Nov 1987 | 421 |
| Livingstone Bramble | 1 Jun 1984 | 26 Sept 1986 | 847 |
| Ray Mancini | 8 May 1982 | 1 Jun 1984 | 755 |
| Arturo Frias | 5 Dec 1981 | 8 May 1982 | 154 |
| Ernesto España | 16 Jun 1979 | 2 Mar 1980 | 260 |
| Roberto Durán | 26 Jun 1972 | 2 Feb 1979 | 2,412 |
| Ken Buchanan | 26 Sept 1970 | 26 Jun 1972 | 639 |
| Mando Ramos | 18 Feb 1969 | 3 Mar 1970 | 378 |
| Carlos Cruz | 29 Jun 1968 | 18 Feb 1969 | 234 |
| Carlos Ortíz | 13 Nov 1965 | 29 Jun 1968 | 959 |
| Carlos Ortíz | 21 Apr 1962 | 10 Apr 1965 | 1,085 |
| Joe Brown | 24 Aug 1956 | 21 Apr 1962 | 2,066 |
| Jimmy Carter | 17 Nov 1954 | 29 Jun 1955 | 224 |
| Jimmy Carter | 15 Oct 1952 | 5 Mar 1954 | 506 |
| Jimmy Carter | 25 May 1951 | 14 May 1952 | 355 |
| Ike Williams | 18 Apr 1945 | 25 May 1951 | 2,228 |
| Juan Zurita | 8 Mar 1944 | 18 Apr 1945 | 406 |
| Sammy Angott | 27 Oct 1943 | 8 Mar 1944 | 133 |
| Sammy Angott | 3 May 1940 | 14 Nov 1942 | 925 |
| Lou Ambers | 22 Aug 1939 | 25 Mar 1940 | 216 |
| Henry Armstrong | 17 Aug 1938 | 22 Aug 1939 | 370 |
| Lou Ambers | 3 Sept 1936 | 17 Aug 1938 | 713 |
| Lou Ambers | 10 May 1935 | 3 Sept 1936 | 482 |
| Barney Ross | 23 Jun 1933 | 15 Apr 1935 | 661 |
| Tony Canzoneri | 14 Nov 1930 | 23 Jun 1933 | 952 |
| Sammy Mandell | 3 Jul 1926 | 17 Jul 1930 | 1,475 |
| Rocky Kansas | 7 Dec 1925 | 3 Jul 1926 | 208 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.