Submission Underground: Chael Sonnen announces the return of Submission Underground. Chael Sonnen announces the return of Submission Underground, revitalizing the popular grappling e...

Chael Sonnen announces the return of Submission Underground, revitalizing the popular grappling event with plans for upcoming competitions.

Chael Sonnen announces the return of Submission Underground, reigniting interest in the grappling promotion. Additionally, he comments on Nassourdine Imavov's title aspirations, suggesting that Imavov should be more proactive in seeking a title shot, which could potentially open opportunities for...