Jeff Burton, Regan Smith lauded for fill-in roles in Tony Stewart's absence Tony Stewart missed his third consecutive NASCAR Sprint Cup Series race this past weekend, and Greg Zipadelli doesn't know when his driver, and close friend, will be back behind the wheel. "It's just an emotional roller coaster all week, you know what I mean?" Zipadelli said after Saturday night?s Irwin Tools Night Race at Bristol Motor Speedway. "It is what it is. More...