Submission Underground 28 took place Sunday, October 31, 2021 with 10 fights in Portland, Oregon.
Submission Underground 27 took place Sunday, October 10, 2021 with 10 fights in Portland, Oregon.
Submission Underground 26 takes place on August 13, 2021 in Portland, Oregon.
Submission Underground 29 took place Sunday, December 12, 2021 with 9 fights in Portland, Oregon.
