The Kansas City Chiefs plan to explore options that include leaving Arrowhead Stadium after voters in Jackson County, Missouri, soundly rejected a sales tax initiative that would have helped to pay for renovations to the 52-year-old building. The Chiefs and Royals, whose Kauffman Stadium shares the Truman Sports Complex with the football stadium, have relied on a three-eighths cent sales tax for upkeep. The franchises wanted to extend that tax with the Royals using their share of the money for a