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 Benson | White | GARAGE JIU-JITSU |
| Jack Berzins - Mitchell | Grey | Gracie Barra Kiama |
| Jack Beutel | White | SOUTHSIDE BRAZILIAN JIU-JITSU OFFICIAL |
| Jack Blunden | Grey | Gracie Barra Charlestown |
| Jack Bollinger | Grey | Gracie Barra Orange |
| Jack Bonetig | White | Will Machado - Comp Team |
| Jack Bonfield | Unknown belt | IGOR MMA SYDNEY |
| Jack Bowie | Blue | Pure Jiu Jitsu Southern Highlands |
| Jack Braddon | Purple | Australian Elite Team |
| Jack Brereton | Blue | Origin Mixed Martial Arts |
| Jack Brindle | Blue | Will Machado - Comp Team |
| Jack Brown | White | Balance BJJ |
| Jack Bryant | Grey | LEGACY |
| Jack Bryant | Grey | LEGACY |
| Jack Buerckner | Blue | Bones mma |
| Jack Burke | White | Goulburn Martial Arts Academy |
| Jack Butler | Purple | Will Machado - Comp Team |
| Jack Buttenshaw | White | Jiu Jitsu Kingdom |
| Jack Cairns | White | Onya Martial Arts |
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