Following Baumgartner's breakout season, he became an unrestricted free agent, and on July 1, 2006, he signed a two-year deal with the Philadelphia Flyers. However, after six games, he was waived on October 17, 2006, and assigned to the Philadelphia Phantoms of the AHL a week later. Baumgartner was claimed on re-entry waivers by the Dallas Stars on February 24, 2007, and after spending the 2007–08 season with Dallas's AHL affiliate, the Iowa Stars, Baumgartner was reassigned by Dallas to the Manitoba Moose.