 Clackson then played three full seasons with the Philadelphia/Adirondack Phantoms, re-signing with the Flyers following the 2009–10 season.On June 7, 2011, Clackson was packaged into a trade that sent him, a 2012 third round draft pick and future considerations, to the Phoenix Coyotes, in exchange for goaltender Ilya Bryzgalov.Failing to come to terms with the Coyotes on a new contract, he became an unrestricted free agent on July 1.