Lightweight

1869–99	Kid Lavigne
1899–
1902	Frank Erne
1902–08	Joe Gans
1908–10	Battling Nelson
1910–12	Ad Wolgast
1912–14	Willie Ritchie
1914–17	Freddy Welsh
1917–25	Benny Leonard¹
1925	Jimmy Goodrich
1925–26	Rocky Kansas
1926–30	Sammy Mandell
1930	Al Singer
1930–33	Tony Canzoneri
1933–35	Barney Ross²
1935–36	Tony Canzoneri
1936–38	Lou Ambers
1938–39	Henry Armstrong
1939–40	Lou Ambers
1940–41	Lew Jenkins
1941–42	Sammy Angott¹
1943–47	Beau Jack (N.Y.), Bob Montgomery (N.Y.), Sammy Angott (NBA), Juan Zurita (NBA), Ike Williams (NBA)
1947–51	Ike Williams
1951–52	James Carter
1952	Lauro Salas
1952–54	James Carter
1954	Paddy DeMarco
1954–55	James Carter
1955–56	Wallace Smith
1956–62	Joe Brown
1962–65	Carlos Ortiz
1965	Ismael Laguna
1965–68	Carlos Ortiz
1968	Teo Cruz
1969	Teo Cruz, Mando Ramos
1970	Mando Ramos, Ismael Laguna, Ken Buchanan
1971	Ken Buchanan (WBA), Mando Ramos (WBC), Pedro Carrasco (WBC)
1972	Ken Buchanan (WBA), Roberto Duran (WBA), Pedro Carrasco (WBC), Mando Ramos (WBC), Chango Carmona (WBC), Rodolfo Gonzalez (WBC)
1973	Roberto Duran (WBA), Rodolfo Gonzalez (WBC)
1974	Roberto Duran (WBA), Rodolfo Gonzalez (WBC), Guts Ishimatsu (WBC)
1975	Roberto Duran (WBA), Guts Ishimatsu (WBC)
1976	Roberto Duran (WBA), Guts Ishimatsu (WBC), Esteban De Jesus (WBC)
1977	Roberto Duran (WBA), Esteban De Jesus (WBC)
1978	Roberto Duran (WBA, WBC)
1979	Roberto Duran,² Jim Watt (WBC), Ernesto Espana (WBA)
1980	Ernesto Espana (WBA), Hilmer Kenty (WBA), Jim Watt (WBC)
1981	Hilmer Kenty (WBA), Sean O'Grady (WBA), James Watt (WBC),
	Alexis Arguello (WBC), Arturo Frias (WBA)
1982	Arturo Frias (WBA), Ray Mancini (WBA), Alexis Arguello (WBC)
1983	Edwin Rosario (WBC), Ray Mancini (WBA)
1984	Edwin Rosario (WBC), Livingstone Bramble (WBA)
1985	Jose Luis Ramirez (WBC), Hector Camacho (WBC), Livingstone Bramble (WBA)
1986	Hector Camacho (WBC), Livingstone Bramble (WBA), Jim Paul (IBF)
1987	Edwin Rosario (WBA), Jose Luis Ramirez (WBC), Greg Haugen (IBF)
1988	Jose Luis Ramirez (WBC), Julio Cesar Chavez (WBA), Greg Haugen (IBF), Julio Cesar Chavez (WBC & WBA title unified)
1989	Pernell Whitaker (IBF, WBC), Edwin Rosario (WBA)
1990	Pernell Whitaker (IBF, WBC), Juan Nazario (WBA)
1991	Pernell Whitaker (IBF, WBA, WBC)
1992	Pernell Whitaker (IBF, WBA, WBC),³ Joey Gamache (WBA)
1993	Dingaan Thobela (WBA), Angel Gonzalez (WBC), Freddie Pendleton (IBF)
1994	Orzubek Nazarov (WBA), Angel Gonzalez (WBC), Rafael Ruelas (IBF)
1995	Orzubek Nazarov (WBA), Angel Gonzalez (WBC), Oscar De La Hoya (IBF)
1996	Gusshie Nazarov (WBA), Jean Baptiste Mendy (WBC), Phillip Holiday (IBF)
1997	Orzubek Nazarov (WBA), Jean Baptiste Mendy (WBC), Philip Holiday (IBF)
1998	Jean Baptiste Mendy (WBA), Cesar Bazan (WBC), Shane Mosley (IBF)
1999	Stefano Zoff (WBA), Stevie Johnston (WBC), Paul Spadafora (IBF)
2000	Takanori Hatakeyama (WBA), Jose Luis Castillo (WBC), Paul Spadafora (IBF)
2001	Julien Lorcy (WBA), Jose Luis Castillo (WBC), Paul Spadafora (IBF)
2002	Leonard Dorin (WBA), Floyd Mayweather (WBC), Paul Spadafora (IBF)
2003	Leonard Dorin (WBA), Floyd Mayweather (WBC), Vacant (IBF)
2004	Jose Luis Castillo (WBC), Juan Diaz (WBA, IBF)
2005	Juan Diaz (WBA), Diego Corrales (WBC), Leavander Johnson (IBF)