Chael Sonnen and FloSports present Submission Underground 2 LIVE on FloGrappling.com Sunday, Dec. 11, at 2:30 p.m. PT. A submission-only grappling event, SUG 2 brings the world's best grapplers and mixed martial artists together to determine the best submission fighters in the world. There are no ties and no draws. One person wins and one person loses every matchup.

Submission Underground 8 took place Sunday, May 12, 2019 with 6 fights at Roseland Theater in Portland, Oregon.