Submission Underground 26 takes place on August 13, 2021 in Portland, Oregon.

Submission Underground 27 took place Sunday, October 10, 2021 with 10 fights in Portland, Oregon.

Submission Underground 25 took place Sunday, July 18, 2021 with 9 fights in Portland, Oregon.

Mason Fowler will be defending his belt for the third time against Bellator heavyweight champion and former light heavyweight champion Ryan Bader. A former NCAA wrestling standout, Bader presents a different challenge than previous defenses. Also on the card, Craig Jones will face Vinny Magalhaes, who are both decorated Brazilian Jiu-Jitsu practitioners, along with former judo Olympic gold medalist Satoshi Ishii. Fowler won all of his previous defenses in the overtime ruleset.

Submission Underground 18 took place Sunday, October 4, 2020 with 10 fights in Portland, Oregon.

The submission grappling event created by Chael Sonnen, Submission Underground, returns for its 19th event and the final for 2020 with a barn burner of jiu-jitsu matches from Oregon. The line-up is peppered with UFC fighters including Donald Cerrone, Rafael dos Anjos, Felicia Spencer and Anthony “Rumble” Johnson amongst former fighters and Bellator standouts.

Submission Underground 16 took place Sunday, July 12, 2020 with 10 fights in Portland, Oregon.

Submission Underground 13 took place Sunday, April 26, 2020 with 10 fights in Portland, Oregon

Submission Underground 12 took place Sunday, March 29, 2020 with 9 fights in Portland, Oregon.

Submission Underground 10 took place Sunday, December 22, 2019 with 8 fights at Roseland Theater in Portland, Oregon.