Jake Shields has built a lengthy, successful career in mixed martial arts by relying on his bread-and-butter: his jiu-jitsu. Sunday, July 17, he puts his grappling skills to the test against Chris Lytle at Chael Sonnen's Submission Underground.

Presented by Chael Sonnen, Submission Underground brings the world's best grapplers under one roof in a submission-only format. Two people enter the cage—one taps out. It's that simple. Watch the inaugural event LIVE on FloCombat.com Sunday, July 17: https://goo.gl/aRJiZ8