Xfinity Series competitors prepare for Darlington

If there‘s ever a venue poised to bring its A-game action following last Saturday evening’s race at Martinsville Speedway, the NASCAR Xfinity Series should be in good shape with Saturday‘s Sport Clips Haircuts VFW Help A Hero 200 (3 p.m. ET, The CW, MRN Radio, SiriusXM NASCAR Radio) at Darlington Raceway.The venerable 1.366-mile track has a fantastic history of high drama and important races.Reigning Xfinity Series champion, driver of the No. 7 JR Motorsports Chevrolet, Justin