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.
| Jack Dowling | Yellow | One Purpose BJJ |
| Jack Downs | Blue | Australian Elite Team |
| Jack Dunley | White | Progression MMA |
| Jack Dunn | White | SJJA Team |
| Jack Edwards | Grey | Shape Jiu Jitsu |
| Jack Esplin | Purple | Atlas Martial Arts / Arruda BJJ |
| Jack Evans | Blue | Behan Jiu Jitsu |
| Jack Ewing | Blue | Behan Jiu Jitsu |
| Jack Falloon | Blue | Australia ASBJJ |
| Jack Fitzsimons | Blue | EQUIPE MESTRE WILSON JIU-JITSU AUSTRALIA |
| Jack Ford | White | shindo new breed |
| Jack Fraid | White | Will Machado - Comp Team |
| Jack frank Brand | White | Full Tilt Fight and Fitness |
| Jack Fredricksen | White | DKMMA |
| Jack Frencham | Grey | Gracie Barra Shellharbour |
| Jack Fullilove | Orange | SJJA Team |
| Jack Gallagher | Unknown belt | United Jiu-Jitsu Academy |
| Jack Gaskell | Blue | Absolute MMA |
| Jack Gibby | White | Unity BJJ AUST |
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