Darian Grubb
…2012, replacing Mike Ford. On July 29, 2014, Grubb was suspended six races for tampered firewall covers, which could lead to more downforce, during the Brickyard 400. JGR shook up their crew chief lineup for 2015, and Grubb moved from Hamlin's No. 11 to JGR's upstart fourth Cup Series car, the No. 19, driven by Carl…