FIGHTER SEARCH
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Fighter Directory
| Name | Division | Record | Nationality |
|---|---|---|---|
| Michael Osborne | Light Heavyweight | 1-6-0 | Isle of Man |
| Anthony Osbourne | Super Welterweight | 11-42-1 | Jamaica |
| Jermaine Osbourne-Edwards | Super Welterweight | 12-2-0 | United Kingdom |
| Richard Oscar | Lightweight | 1-0-0 | Tanzania |
| Pablo Oscar Font | Super Lightweight | 0-1-0 | Argentina |
| Hassan Oseni | Cruiserweight | 2-1-0 | Canada |
| Jampier Oses | Super Lightweight | 21-18-2 | Venezuela |
| Jake Osgood | Super Welterweight | 3-92-0 | United Kingdom |
| Lachlan O'Shea | Welterweight | 9-6-0 | Australia |
| Larry O'Shields | Welterweight | 17-12-3 | United States |
| Kenshin Oshima | Flyweight | 9-5-1 | Japan |
| Mitsuyoshi Oshima | Super Welterweight | 6-8-2 | Japan |
| Toya Oshima | Super Flyweight | 0-2-0 | Japan |
| Elizabeth Oshoba | Featherweight | 10-0-0 | Nigerian |
| Christian Oshodin | Light Heavyweight | 7-0-0 | Austria |
| Terry Osias | Light Heavyweight | 13-1-0 | Canada |
| Christopher Osicho Otieno | Lightweight | 1-5-1 | Kenya |
| Andrei Osievschi | Middleweight | 1-1-0 | Moldova |
| Yury Osipov | Middleweight | 5-0-0 | Russia |
| Montela Oskarino Momot | Lightweight | 1-1-0 | Indonesia |
| Eduard Oslobanu | Cruiserweight | 0-2-0 | Moldova |
| Sultan Osmanli | Heavyweight | 5-3-0 | Turkey |
| Michael Osmanu Osunla | Super Middleweight | 12-3-0 | Ghana |
| Ayrton Osmar Gimenez | Super Featherweight | 21-1-0 | Argentina |
| Giuseppe Osnato | Lightweight | 11-1-0 | Italy |
| Carlos Osorio | Super Featherweight | 13-8-1 | Nicaragua |
| Jonathan Osorio | Light Heavyweight | 2-2-0 | Nicaragua |
| Saul Osorio | Welterweight | 2-0-1 | United States |
| Tiago Osorio Muxanga | Bantamweight | 3-1-0 | Mozambique |
| Marcos Osorio-Betancourt | Middleweight | 11-2-1 | Puerto Rico |
| Armando Ospino | Featherweight | 0-2-1 | Colombia |
| Lawrence Osueke | Light Heavyweight | 10-1-1 | England |
| Craig O'Sullivan | Heavyweight | 1-0-0 | Australia |
| Daniel O'Sullivan | Super Welterweight | 7-1-0 | Ireland |
| Gary O'Sullivan | Middleweight | 32-6-0 | Irish |
| Joe O'Sullivan | Light Heavyweight | 5-3-0 | England |
| Mikey O'Sullivan | Super Featherweight | 1-0-0 | Welsh |
| Michael Osumah | Super Welterweight | 11-1-0 | Nigeria |
| Adama Osumanu | Cruiserweight | 27-5-0 | Ghana |
| Haruna Osumanu | Super Middleweight | 17-4-0 | Ghana |
| Angel Osuna | Middleweight | 11-4-1 | Mexico |
| Gerardo Osuna | Light Heavyweight | 24-3-0 | Mexico |
| Jaime Osuna | Middleweight | 12-0-0 | Mexico |
| Jonathan Osuna | Super Middleweight | 3-1-0 | Mexico |
| Diego Osuna Zuniga | Super Welterweight | 2-1-0 | United States |
| Abimbola Osundairo | Super Middleweight | 6-1-0 | Nigeria |
| Roberto Osvaldo Peralta | Heavyweight | 6-4-0 | Argentina |
| Maneno Oswald | Super Middleweight | 39-31-5 | Tanzania |
| Yeury Otanez | Bantamweight | 5-3-3 | Dominican Republic |
| Shinsei Otani | Super Featherweight | 13-3-0 | Japan |
| Henry Oteba | Lightweight | 10-2-0 | Uganda |
| Ivan Otero | Lightweight | 15-3-0 | Puerto Rico |
| Byambaerdene Otgonbaatar | Super Welterweight | 2-0-0 | Mongolia |
| Brighton Otieno | Bantamweight | 0-1-0 | Kenya |
| Jared Otieno | Bantamweight | 0-0-0 | Kenya |
| Owenge Otieno | Super Welterweight | 1-0-0 | Kenya |
| Douglas Otieno Okola | Light Heavyweight | 24-9-0 | Kenya |
| Osasu Otobo | Heavyweight | 15-6-1 | Germany |
| Daniel Otoo | Super Flyweight | 7-2-0 | Ghana |
| Francis Otoo | Heavyweight | 1-0-0 | Ghana |