Submission Underground was originally founded by UFC veteran Chael Sonnen, and quickly became one of the biggest professional grappling promotions in North America. Their first event took place on September 17th, 2016 and they have gone from strength to strength since then. Over the years, Submission Underground has featured some of the biggest names in both MMA and BJJ competition. From Jon Jones and Ryan Bader to Craig Jones and Gilbert Burns, fans of the promotion have been regularly treated to incredible matches. They have also featured exciting innovations like tag-team matches and introduced both male and female absolute championship belts.