In 2001, Whisenhunt was hired by the Steelers to coach their tight ends. He was able to make players such as Mark Bruener and Jay Riemersma, both considered no longer at their best, into great blocking backs. He became offensive coordinator in Pittsburgh for the 2004 season after Mike Mularkey became the head coach of the Buffalo Bills. Whisenhunt had instant success in his role. While Mularkey was known for creating exciting trick plays, Whisenhunt became more of a cautious play-caller, whose well-timed trick plays surprised the Steelers' opponents because they were very unlike the conservative Pittsburgh run game. 