Kyle Chambers

Submission Underground 23 takes place on May 23, 2021 in Portland, Oregon.

Submission Underground 28 took place Sunday, October 31, 2021 with 10 fights in Portland, Oregon.

Submission Underground 22 took place April 25th from Portland, Oregon.

UFC Fight Pass Invitational 9 took place Thursday, December 5, 2024 with 10 fights in Las Vegas, Nevada.

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.