Submission Underground finally makes its 2021 debut today with Submission Underground 21. The card is headlined by the Submission Underground king...
Submission Underground 17 is a grappling event that was held on Sunday 08.30.2020 at 12:00 PM ET 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...
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