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| Boxing Men: WBO World Championship Light Flyweight | 
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| Mon. | Year | Location | 
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| Sep. | 2006 | Caguas (prc) | Hugo Cazares (mex) | Nelson Dieppa (prc) |
| Jun. | 2006 | Tucson (usa) | Hugo Cazares (mex) | Domingo Guillen (dom) |
| Oct. | 2005 | Tucson (usa) | Hugo Cazares (mex) | Kaichon Sor Vorapin (tha) |
| Aug. | 2005 | Ponce (prc) | Hugo Cazares (mex) | Alex Sánchez (prc) |
| Apr. | 2005 | Hato Rey (prc) | Hugo Cazares (mex) | Nelson Dieppa (prc) |
| Jan. | 2005 | Bayamón (prc) | Nelson Dieppa (prc) | Alex Sánchez (prc) |
| Jul. | 2004 | Louisville (usa) | Nelson Dieppa (prc) | Ulises Solis (mex) |
| Mar. | 2004 | Guaynabo (prc) | Nelson Dieppa (prc) | Kermín Guardia (col) |
| Jul. | 2003 | Barranquilla (col) | Kermín Guardia (col) * | Jhon Molina (col) |
| Aug. | 2002 | Carolina (prc) | Nelson Dieppa (prc) | Jhon Molina (col) |
| Sep. | 2001 | NewYork (usa) | Nelson Dieppa (prc) | Fahlan Sakkreerin (tha) |
| Apr. | 2001 | New York (usa) | Nelson Dieppa (prc) | Andy Tabanas (phi) |
| Feb. | 2001 | Las Vegas (usa) | vacant | Fahlan Sakkreerin (tha) |
| Andy Tabanas (phi) | ||||
| Aug. | 2000 | -- | vacant | -- |
| Jul. | 2000 | Miami (usa) | Will Grigsby (usa) | Nelsin Dieppa (prc) |
| Mar. | 2000 | -- | vacant | -- |
| Feb. | 2000 | Brakpan (saf) | Masibulele Makepula (saf) | Jake Matlala (saf) |
| Jan. | 2000 | -- | vacant | -- |
| Jul. | 1999 | Tijuana (mex) | Michael Carbajal (usa) | Jorge Arce (mex) |
| Apr. | 1999 | Sassari (ita) | Jorge Arce (mex) | Salvatore Fanni (ita) |
| Dec. | 1998 | Tijuana (mex) | Jorge Arce (mex) | Juan Domingo Cordóba (arg) |
| May | 1998 | Santiago del Estero (arg) | Juan Domingo Cordóba (arg) | Sandro Orlando Oviedo (arg) |
| Jan. | 1998 | Santiago del Estero (arg) | Juan Domingo Cordóba (arg) | Melchor Cob Castro (mex) |
| Aug. | 1997 | Inglewood (usa) | Melchor Cob Castro (mex) | Jesús Chong (mex) |
| May | 1997 | Las Vegas (usa) | Jesús Chong (mex) | Eric Grffin (usa) |
| Apr. | 1997 | -- | vacant | -- |
| Feb. | 1997 | London (gbr) | Jake Matlala (saf) | Mickey Cantwell (gbr) |
| Apr. | 1996 | Liverpool (gbr) | Jake Matlala (saf) | Paul Weir (gbr) |
| Nov. | 1995 | Glasgow (gbr) | Jake Matlala (saf) | Paul Weir (gbr) |
| Apr. | 1995 | Irvine (gbr) | Paul Weir (gbr) | Renato Magramo (phi) |
| Nov. | 1994 | Irvine (gbr) | Paul Weir (gbr) | Paul Oulden (saf) |
| Oct. | 1994 | -- | vacant | -- |
| Jul. | 1994 | Phoenix (usa) | Michael Carbajal (usa) | Josue Camacho (prc) |
| Feb. | 1994 | Glasgow (gbr) | Josue Camacho (prc) | Paul Weir (gbr) |
| Jul. | 1992 | San Juan (prc) | Josue Camacho (prc) | Eduardo Vallejo (mex) |
| May | 1992 | -- | vacant | -- |
| Nov. | 1990 | Jakarta (ina) | José de Jesús (prc) | Abdi Pohan (ina) |
| May | 1990 | Talcahuano (chl) | José de Jesús (prc) | Alli Gálvez (chl) |
| Oct. | 1989 | San Juan (prc) | José de Jesús (prc) | Isidro Pérez (mex) |
| May | 1989 | San Juan (prc) | José de Jesús (prc) | Fernando Martínez (mex) |
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Note: * Interim world title |
