People who have competed at Australian Brazilian jiu-jitsu and grappling events. Australia only, for now. See Australian BJJ rankings for recorded wins by belt, state, and ruleset.
| Oscar Houston | Yellow | Fight Club Jiu-Jitsu team |
| Oscar Hubbard | Blue | Absolute MMA |
| Oscar Hudson Ramirez | Grey | Alliance BJJ Australia |
| Oscar Khamphet | Unknown belt | The Grappling Lab Prestons |
| Oscar Kilmurray | Grey | Apex Jiu Jitsu Academy |
| Oscar Korman | Grey | SOUTHSIDE BRAZILIAN JIU-JITSU OFFICIAL |
| Oscar Leng | Purple | Lemos Brazilian Jiu-Jitsu Academy |
| Oscar Liang | Purple | Gracie Barra West Ryde |
| Oscar Martin | Grey | Gracie Barra Edgeworth |
| Oscar McCulloch | Unknown belt | Virtue Brazilian Jiu-Jitsu Australia |
| Oscar McKay | White | The Good Dose |
| Oscar Menant | Grey | Team Lead |
| Oscar Morgan | Blue | United Jiu-Jitsu Academy |
| Oscar Mountstephen | Grey | Honour Brazilian Jiu Jitsu |
| Oscar Murdoch | White | Portal Brazilian Jiu Jitsu |
| Oscar Nguyen | Grey | Melbourne Jiu -Jitsu Academy |
| Oscar Nieuwenhout | Yellow | De Been 100% Jiu Jitsu |
| Oscar Oultram | Grey | Gracie Barra Charlestown |
| Oscar Petersen | Blue | Spirit Taekwondo |
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