GOODLETTSVILLE, Tenn., 2017-Sep-19 — /EPR Retail News/ — Dollar General (NYSE: DG) is excited to partner with the Big 12 Conference and ESPN Events to serve as the Official Discount Retail Sponsor for the Big 12 Conference for the 2017-2018 academic year. Additionally, the major discount retailer will serve as the Conference’s Official Homegating and…