DARLINGTON, S.C. — Carl Edwards took the lead on the last pit stop and held off Denny Hamlin on a restart eight laps from the end for his first Southern 500 victory Sunday night. Edwards was two laps behind early in the long, long, nearly five-hour NASCAR Sprint Cup race, slowed by a record 18 cautions at Darlington Raceway. Pole-sitter Brad Keselowski was second and Hamlin finished third.