With ticket sales a bit slower as the third season approaches, the Cardinals are requiring fans who want to buy tickets to the Dallas game on Oct. 12 to also buy tickets for the Aug. 7 exhibition opener vs. New Orleans. Cardinals' fans have "created a decisive home-field advantage" the past two years, and the team wants to keep it that way by discouraging single-game ticket sales to Cowboys' fans, team spokesman Mark Dalton said. "Our goal is to have as many Cardinal fans in the stadium as possible," Dalton said.