Carl Edwards' crew chief stepped down Tuesday, 19 races removed from a disheartening defeat in last year's championship race. Bob Osborne cited undisclosed health concerns in his decision to relinquish the No. 99 Ford, which has been stuck in a slump since Edwards ended last season tied with Tony Stewart in the Chase for the Sprint Cup championship. Full Story.(Photo: Jared C. Tilton/Getty Images for NASCAR)