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John Nemechek is the younger brother of Joe Nemechek. Both brothers are professional stock car racing drivers. John has competed in various NASCAR series, including the Xfinity Series and the Camping World Truck Series. He has also raced in the ARCA Menards Series and the K&N Pro Series East. Joe, on the other hand, has had a successful career in the NASCAR Cup Series, with multiple wins and top-five finishes.