It’s round three this weekend in NASCAR’S 10-race Chase for the Sprint Cup championship. We’ll have live coverage of the Triple-A 400 from Dover International Speedway on AM 1590 and FM 95.5 beginning at one o’clock Sunday afternoon. After finishing second at both Chicago and New Hampshire, Jimmie Johnson is atop the championship standings, but he holds only a one-point advantage over Brad Keselowski. Denny Hamlin's win last Sunday at New Hampshire moved him to within seven points of the lead.