[1] He was selected by the Pittsburgh Steelers in 2000, having also played for the New York Giants, Arizona Cardinals and New Orleans Saints.

Born in Tuscaloosa, Alabama, Clancy attended Holt High School before playing college football at East Central Community College in Decatur, Mississippi,[2] and then at Ole Miss.

[3] As a senior in 1999, he was team captain[citation needed] and a third-team All-American selection by The Sporting News and The Football News[4][citation needed] Clancy was selected by the Steelers in the third round in 2000 and played for them for four years.

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.