| Name |
Nationality |
| |
|
| Oba, Shigeyuki | 
Japan | 
| |
|
| Oberacher, Toni | 
Austria |
| |
|
| Oberleihner, Gerhard |
Austria |
| |
|
| Obojes, Alexandre | 
Italy |
| |
|
| Obosa, Ericson | 
Philippines |
| |
|
| O'Brien, Mark | 
Ireland |
| |
|
| Obrist, Martin | 
Switzerland |
| |
|
| Ocaña Pernia, Luis | 
Spain |
| |
|
| Ocana, Hugo | 
Argentina |
| |
|
| Ochiai, Hideyuki |
Japan |
| |
|
| Ochowicz, Jim | 
United States of America |
| |
|
| Ochsner, Robert |
Switzerland |
| |
|
| Oconer, Bert |
Philippines |
| |
|
| O'Connor, Armanda | 
Great Britain | 
| |
|
| Odgaard Nielsen, Tage | 
Denmark |
| |
|
| O Donnovan, Gerald |
Great Britain |
| |
|
| Odriozola Mugarza, Jon |
Spain |
| |
|
| Offermans, Wiel | 
The Netherlands |
| |
|
| Oh, Chanil | 
South-Korea |
| |
|
| Oh, Sang Hoon |
South-Korea |
| |
|
| Öhlböck, Ulrich |
Austria |
| |
|
| Oja, Raul | 
Russia |
| |
|
| Okubo, Shuichi |
Japan |
| |
|
| Olaberria, Pello |
Spain |
| |
|
| Olds, Shelley |
United States of America |
| |
|
| Olejnicek, Dusan | 
Czech Republic |
| |
|
| Oleknavicius, Algis | 
Germany |
| |
|
| Oliveira, Fernando | 
Portugal |
| |
|
| Oliveira, Jose Manuel |
Spain |
| |
|
| Oliveira, Manuel |
Portugal |
| |
|
| Oliveira, Victor |
Portugal |
| |
|
| Oliveira E Silva, José Augusto |
Portugal |
| |
|
| Oliveira Figueiredo, Paulo Alexandre |
Portugal |
| |
|
| Oliveira Sousa, Evandro | 
Brazil |
| |
|
| Oliveri, Alfredo | 
France |
| |
|
| Oliveri, François |
France |
| |
|
| Oliveri, Giuseppe |
Italy |
| |
|
| Olivero, Stefano |
Italy |
| |
|
| Olivier, Fred |
France |
| |
|
| Ollokiegi, Fernando |
Spain |
| |
|
| Olmer, Bill | 
Belgium |
| |
|
| Olmo, Giuseppe |
Italy |
| |
|
| O'Loughlin, Brian |
Ireland |
| |
|
| O'Loughlin, Declan |
Ireland |
| |
|
| Olsen, Bjarne |
Denmark |
| |
|
| Olsen, Greg |
United States of America |
| |
|
| Olsen, Jack Arvid |
Denmark |
| |
|
| Olsen, Ole Havard | 
Norway |
| |
|
| Olsen, Tommy |
Norway |
| |
|
| Olson, Mark |
United States of America |
| |
|
| Omar, Pablo | 
Colombia |
| |
|
| Omloop, Marcel |
Belgium |
| |
|
| Omori, Kenichi |
Japan |
| |
|
| Onderbeke, Olivier |
Belgium |
| |
|
| O'Neill, Nathan | 
Australia |
| |
|
| Ongena, Thomas |
Belgium |
| |
|
| Onghena, Dirk |
Belgium |
| |
|
| Onishi, Keita |
Japan |
| |
|
| Ooghe, Franky | 
Unknown |
| |
|
| Oohashi, Isao |
Japan |
| |
|
| Oosterhof, Popke |
The Netherlands |
| |
|
| Oosterwoud, Elske |
The Netherlands |
| |
|
| Oppelt, Alexander |
Germany |
| |
|
| Oppelt, Herbert |
Germany |
| |
|
| Opperman, Matt |
United States of America |
| |
|
| Orbie, Gilbert |
Belgium |
| |
|
| Orda, Jan | 
Poland |
| |
|
| Ordiñana Cuquerella, Bernardo |
Spain |
| |
|
| Ordonez Avila, Alejandra |
Colombia |
| |
|
| Oredsson, Thomas |
Denmark |
| |
|
| Oria Ibarguren, Jon |
Spain |
| |
|
| Origer, Isabelle |
Unknown |
| |
|
| Orioli, Robert |
France |
| |
|
| Oroz Ugalde, Juan José |
Spain |
| |
|
| Örtle, Mathias |
Switzerland |
| |
|
| Ortuno Romero, José Antonio |
Spain |
| |
|
| Osadchyy, Victor | 
Ukraine |
| |
|
| Oschwald, Wolfgang |
Germany |
| |
|
| Osipow, Daniel |
United States of America |
| |
|
| Osoro Ramos, Shanti |
Spain |
| |
|
| Osuch, Pawel |
Poland |
| |
|
| Oswald, Greg |
United States of America |
| |
|
| Ota, Tetsuya |
Japan |
| |
|
| Otálvaro, Luis Fernando |
Colombia |
| |
|
| Otano, Inaki |
Spain |
| |
|
| Otin, Luis Vicente |
Spain |
| |
|
| Ott, Werner |
Switzerland |
| |
|
| Ottosson, Johan | 
Sweden |
| |
|
| Oubron, Robert |
France |
| |
|
| Ouellet, Christian | 
Canada |
| |
|
| Oulego Moral, Luis |
Spain |
| |
|
| Oulmi, Kheider | 
Algeria |
| |
|
| Oussoren, Jaco |
The Netherlands |
| |
|
| Ouvenhage, Kobus | 
South Africa |
| |
|
| Ovalle Romero, Ricardo |
Colombia |
| |
|
| Oven, Maja | 
Slovenia |
| |
|
| Overgaard, Henrik |
Unknown |
| |
|
| Owen, Nick |
Great Britain |
| |
|
| Oxborrow, Ted |
United States of America |
| |
|
| Oyen, Etienne |
Belgium |
| |
|
