By Holly Cain, NASCAR.com // MARTINSVILLE, Va. – Good pit strategy and a highly-motivated team rallied Hendrick Motorsports’ Chase Elliott to the NASCAR Cup Series victory Sunday in the Cook Out 400 at Martinsville Speedway; the sport’s reigning Most Popular Driver delivering Chevrolet its first win of the season all to the delight of a huge enthusiastic crowd at the historic half-miler. Elliott short-pitted on lap 261 to gain track position then moved his No. 9 Hendrick Mot