Dallas Cowboys' Assistant Head Coach Tony Sparano, the presumptive front-runner to fill the Miami Dolphins' coaching vacancy, was scheduled to fly Tuesday night to Miami on one of owner Wayne Huizenga's private jets and could be named the club's new head coach by Wednesday. Dolphins' GM Jeff Ireland, who most recently worked in the Dallas personnel department as vice president of college and pro scouting, is familiar with Sparano and his coaching style. Ireland left for Dallas on Tuesday afternoon. He is expected to return with Sparano, who interviewed with Ireland for the Miami job on Jan. 5. Tabbed as the favorite to take over the Dolphins almost immediately after Vice President Bill Parcells dismissed Cam Cameron after only one season on the job, Sparano is one of four candidates to have interviewed with Dolphins' officials. The club also met with Defensive Coordinator Leslie Frazier of the Minnesota Vikings, Jim Schwartz of the Tennessee Titans, and former Baltimore Ravens' Defensive Coordinator Rex Ryan. Sparano, 46, also interviewed for the head coach openings in Atlanta and Baltimore.