People who have competed at Australian events. Australia only, for now.
| Orson McComish | Brown | SJJA Team |
| Osaid Alshakhreet | Grey | Gracie Barra Liverpool |
| Oscar Anderson | White | Empire Martial Arts |
| Oscar Atkinson | White | M16/Beachside Jiu-Jitsu |
| Oscar Denny | Grey | SJJA Bulimba |
| Oscar Harvey | White | Gracie Sutherland Shire (formerly Gracie Miranda) |
| Oscar Hubbard | Blue | Absolute MMA |
| Oscar Morgan | Unknown belt | United Jiu-Jitsu Academy |
| Oscar Mountstephen | White | Honour Brazilian Jiu Jitsu |
| Oscar Nguyen | Grey | Melbourne Jiu -Jitsu Academy |
| Oscar Petersen | Blue | Spirit Taekwondo |
| Oscar Piper | White | SJJA Palm Beach |
| Oscar Robinson | Blue | Martial Arts Spirit |
| Oscar Sandy | Grey | TRINITY Australia |
| Oscar Skylas | Yellow | Pure Jiu Jitsu Southern Highlands |
| Oscar Steele | Grey | Lemos Brazilian Jiu-Jitsu Academy |
| Oscar Still | Grey | Coringa Jiu-Jitsu |
| Oscar Walsh | White | 4oz Fight Club |
| Oscar Williams | Grey | Gracie Barra Menai |
Wave