Clancy was drafted by the Steelers in the third round in 2000 and played for them for four years.[5] After his time with the Steelers, he signed with the Giants,[4] where he played for one year, followed by a year with the Cardinals. He then signed with the Saints in 2007. In 2009, he began the season as a projected starter, but injured his knee in the opening game, thus played in only 2 games, ending up on the injured reserve list while the team won Super Bowl XLIV.[6] He was an unrestricted free agent after the 2009 season, but the Saints re-signed him on August 30, 2010.[3] He was released 5 days later.[7]