Strength Training and BJJ Jeff Hairston, SSC | November 11, 2019 Starting Strength Coaches Jeff Hairston and Grant Broggi discuss strength and Brazilian Jiu Jitsu. Jeff is a brown belt under the Mendes Brothers at Art of Jiu Jitsu and a coach at The Strength Co., and Grant is the owner of the Strength Co in Orange County, CA. Discuss in Forums