Submission Underground 29 took place Sunday, December 12, 2021 with 9 fights in Portland, Oregon.
| Actor | Role |
|---|---|
 Andy VarelaSelf | Self |
 Sean StricklandSelf | Self |
 Mercedes WhiteSelf | Self |
 Tara LaRosaSelf | Self |
| JJohn SimonSelf | Self |
| PPhelan CarronSelf | Self |
 Matt FerraioloSelf | Self |
 Travis MooreSelf | Self |
| JJesse HardenbrookSelf | Self |
| JJimmy AltmanSelf | Self |
| KKemoy AndersonSelf | Self |
| TTerren CassonSelf | Self |
 Colton VaughnSelf | Self |
| ZZachary MinteerSelf | Self |
| MMark HamelSelf | Self |
| JJason PattersonSelf | Self |
| CCaleb SteckerSelf | Self |
| IIan KingSelf | Self |