Miettinen spent two-years in the AHL before playing his first full season in the NHL in the 2005–06 season with the Stars.
On July 3, 2008, Miettinen signed a 3-year $7 million contract with the Minnesota Wild.
He was chosen to play for Finland in the 2006 Winter Olympics but was unable to participate due to an upper body injury. He was replaced on the team by Niklas Hagman.
On December 12, 2011, Miettinen agreed on a two-year deal to return to the NHL with the Tampa Bay Lightning. However the following day he was claimed off re-entry waivers by the Winnipeg Jets.