John l Sullivan-1885-1892

James J Corbet 1892-1897

Bob Fitzsimmons 1897-1899

James J Jefries 1899-1905 ret

Marvin Hart 1905-1906

Tommy Burns 1906-1908

Jack Johnson 1908-1915

Jess Willard 1915-1919

Jack Dempsey 1919-1926

Gene Tunney 1926-1928 ret

Max Schmelling 1930-1932

Jack Sharky 1932-1933

Primo Carnera 1933-1934

Max Baer 1934-1935

James J Braddock 1935-1937

Joe Louis 1937-1949 ret

Ezzard Charles 1949-1951

Joe Wallcott 1951-1952

Rocky Marciano 1952-1956 ret

Floyd Patterson 1956-1959

Ingemar Johansson 1959-1960

Floyd Patterson 1960-1962

Sonny Liston 1962-1964

Cassius Clay 1964-1970

Joe Frazier 1970-1973

George Foreman 1973-1974

Muhammad Ali 1974-1978

Leon Spinks 1978

Muhammad Ali 1978-1979ret

Larry Holmes 1980-1985

Michel Spinks 1985-1988

Mike Tyson 1988-1990

James Douglas 1990

Evander Holyfield 1990-1992

Riddock Bowe 1992-1993

Evander Holyfield 1993-1994

Michael Moorer 1994

George Foreman 1994-1997

Shannon Briggs 1997-1998

Lennox Lewis 1998-2001

Hasim Rahman 2001

Lennox Lewis 2001-2004 ret