Major Martin: Truex Jr. off Harvick to win Southern 500
DARLINGTON, S.C. (AP) — Martin Truex Jr. has already won two of NASCAR’s most coveted races. Now, he’s seeking a much bigger honor. Truex led the final 28 laps and held off the Kevin Harvick’s powerhouse car to win the Southern 500, closing the summer season with a second of Sprint Cup’s “crown jewel” races on Labor Day weekend. She…