Submission Underground finally makes its 2021 debut today with Submission Underground 21. The card is headlined by the Submission Underground king and men’s champion Mason Fowler defending his belt against another SUG mainstay in “The Boogeyman” Richie Martinez. Both Martinez and Fowler won their most recent bouts by armbar in regulation at SUG’s last event, Submission Underground 20.
| Actor | Role |
|---|---|
 Mason FowlerSelf | Self |
 Richie MartinezSelf | Self |
 Amanda LoewenSelf | Self |
 Roxanne ModafferiSelf | Self |
 Andy VarelaSelf | Self |
 Satoshi IshiiSelf | Self |
 Ilima-Lei MacfarlaneSelf | Self |
 Jessica EyeSelf | Self |
 Kyle ChambersSelf | Self |
| CChase DavisSelf | Self |
| JJoseph MckaySelf | Self |
| AAndrew AlexanderSelf | Self |
 Don StonerSelf | Self |
| PPhilip SchwartzSelf | Self |
| AAaron TiegsSelf | Self |
| AAndrew SidelingerSelf | Self |
 Liz TracySelf | Self |
| KKristin MikkelsonSelf | Self |