Darrell Wallace, Jr. (born October 8, 1993), also known as Bubba Wallace, is an American professional stock car racing driver. He currently competes full-time in the NASCAR Xfinity Series, driving the No. 6 Ford Mustang for Roush Fenway Racing. Previously Wallace was signed as a development driver for Joe Gibbs Racing where Wallace competed in the Camping World Truck Series, driving the No. 54 Toyota Tundra for Kyle Busch Motorsports.