Tony Stewart will miss the start of his final NASCAR season after fracturing his back in an accident on an all-terrain vehicle, Stewart-Haas Racing said Thursday. The three-time NASCAR champion sustained a ''burst fracture of the L1 vertebra'' when he crashed on an ATV Sunday and he had surgery Wednesday, the team said. A timetable for Stewart's return has not been determined, but SHR said he is expected to make a full recovery and race this year. More...