| Name | Nation |
|---|---|
| O'Grady, Stuart | AUS |
| O'Sullivan, Finn | IRL |
| Obando Torres, Jairo | COL |
| Ochoa Plazas, Israel | COL |
| Odriozola Mugarza, Jon | ESP |
| Olano, Abraham | ESP |
| Omloop, Wim | BEL |
| Orozco, Francisco | COL |
| Osa Eizaguirre, Aitor | ESP |
| Osorio, Hernan | COL |
| Ospina, German | COL |
| Otalvaro, Jorge Leon | COL |
| Otxoa Palacios, Ricardo | ESP |
| Outschakov, Serguei | UKR |
| Oyster, Bill | USA |
| Ozers, Kaspars | LAT |
