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.
| John Jbarah | White | Science of JiuJitsu |
| John Jones | White | Limitless MMA |
| John Labanie | White | TRINITY Australia |
| John Lawry | Blue | 5th Wave BJJ |
| John Loughhead | Brown | Mildura Martial Arts |
| John Louloudias | White | Lions Den Academy |
| John Luhr | Black | MYBJJ TEAM |
| John Maiello | White | SAMBO South Australia (Marion) |
| John Martin Fraser | Unknown belt | Oasis Fight Academy |
| John Mavrakis | Unknown belt | Origin Mixed Martial Arts |
| John McAleer | Unknown belt | House of Water |
| John Mcghee | White | Geraldton BJJ |
| John Min | Blue | SJJA Team |
| John Murdock | Blue | Newcastle Mixed Martial Arts |
| John Murphy | Purple | Australian Elite Team |
| John Musca | Brown | 10th Planet Jiu Jitsu Australia |
| John Ng | Purple | Gracie Botany |
| John Nguyen | White | Sydney Wrestling Academy |
| John Nguyen | Purple | DOMINANCE |
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