Chael Sonnen’s Submission Underground makes its debut on UFC Fight Pass Sunday, with a star-studded lineup of MMA notables scheduled to compete. And because you know there’s bound to be something a little crazy on the card if Sonnen is involved, the event will feature some tag-team grappling, as well. Submission Underground 8 takes place Sunday at Roseland Theater in Portland, Ore. The submission-only grappling card streams in its entirety on UFC Fight Pass at 6 p.m. ET
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