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 Spagnolo |
| Unknown belt |
| PEAK Brazilian Jiu Jitsu |
| Jack Spark | Brown | Black Dragon Kai |
| Jack Sparsis | White | Progression MMA |
| Jack Staples | White | Carlson Gracie Gold Coast |
| Jack Steel | White | Crazy Team Australia |
| Jack STEEL | Grey | Gracie Barra Penrith |
| Jack Steff | Grey | Courage Training Centre |
| Jack Stephenson | White | Australian Elite Team |
| Jack Stone | Grey | Gracie Barra Tweed Heads |
| Jack Strang | White | Absolute MMA |
| Jack Sullivan | White | Gracie Barra Townsville |
| Jack Tassell | Blue | Galeb BJJ Helensvale |
| Jack Telfer | White | PEAK Brazilian Jiu Jitsu |
| Jack Tomich | White | Mildura Martial Arts |
| Jack Towns | White | SOUTHSIDE BRAZILIAN JIU-JITSU OFFICIAL |
| Jack Tucker | Blue | Stewie's House Of BJJ |
| Jack Vandersteen | Brown | Legends Brazilian Jiu Jitsu Australia |
| Jack Visic | Blue | The Agoge Brazilian Jiu-Jitsu |
| Jack Walsh | White | LEGACY |
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