Tony Stewart is skipping a second straight Sprint Cup race, and it is not clear when the NASCAR star might return after he struck and killed a driver at a dirt-track race in New York last weekend. ''This decision was Tony's,'' said Brett Frood, executive vice president of Stewart-Haas Racing. He's grieving - made the decision he's not ready to get in the race car and will take it week by week.'' Jeff Burton will drive the No. 14 car in Stewart's place in Sunday's Cup race at Michigan International Speedway. Last Saturday during a sprint car race in Canandaigua, New York, Stewart appeared to clip Kevin Ward Jr.'s car, sending it spinning, Ward left the car during the caution period, walked down the track and was hit by Stewart's car. More...