James Carlyle "Carl" Long is an American professional stock car racing driver, mechanic, and team owner. He last competed part-time in the NASCAR Xfinity Series, driving the No. 66 Toyota Supra for MBM Motorsports. In the past, he served as a mechanic for Mansion Motorsports, Spears Motorsports, and Travis Carter Motorsports. He was a crew chief at Front Row Motorsports for Eric McClure and Competition director at Rick Ware Racing.

Motorsports Business Management LLC, operating as MBM Motorsports and Power Source, is an American professional stock car racing team that currently competes in the NASCAR Cup Series, NASCAR Xfinity Series, NASCAR Craftsman Truck Series, and ARCA Menards Series. MBM was co-owned and operated by Long and driver Derek White until early 2016, with full operation of the team being taken by Long and his family after White was arrested on smuggling charges.