Nascar will race at Martinsville Speedway this Sunday. Hear the race of WBUT 1050am and at wbut.com beginning at 1pm. This is the final race to determine the four-driver field that will race for the Cup Series championship next weekend in Phoenix. Martin Truex, Jr. is the defending race winner – and has won the past two races at Martinsville. He needs a win Sunday to make the final four.