 5 car of Kasey Kahne for the last 9 races of the season starting at New Hampshire.On November 1, 2017, it was announced that Grubb will be the crew chief for William Byron for the 2018 Monster Energy NASCAR Cup Series season.On October 10, 2018, Hendrick Motorsports announced that Grubb will move on to a technical director position while Knaus takes over crew chief duties for the No.