NASCAR's Sprint Cup Series returns to Michigan International Speedway for the second time in two months this weekend for Sunday's Pure Michigan 400. Dale Earnhardt Jr. ended his four-year, 143-race winless streak when the series ran at this two-mile racetrack for the first time this season during the third weekend of June. Kyle Busch won at Michigan one year ago. Last weekend at Watkins Glen, Marcos Ambrose took the checkered flag. Jimmie Johnson holds a one-point lead over Greg Biffle and a two-point advantage over Matt Kenseth atop the Cup Standings. Dale Jr. and Brad Keselowski round out the top-five.