Mark Martin, at age 50, has seen a lot of changes in the way NASCAR does business and the way it handles the competition side of racing. Apparently, all the changes haven’t effected Mark Martin that much. Martin held off teammate Jimmie Johnson to win Saturday night’s race at Darlington. It was Martin’s second win in the last four races. It appears as if Hendrick Motorsports has breathed new life into Martin’s career. Just two years ago, Martin was running a limited schedule and now is contending for the Chase for the Cup.