As the coaching carousel in the NFL continues to spin, Pittsburgh Steelers offensive coordinator Todd Haley is being careful as he considers the Arizona Cardinals interest in him for their open head coaching position, according to a report from Ed Werder of ESPN on Friday.

Sources in Werder's report say that Haley hasn't officially accepted Arizona's offer for an interview because he wants to be sure that the Cardinals, who fired previous coach Ken Whisenhunt on Monday, are seriously considering him as a candidate. Serious enough, sources said, so that Haley would have to think about leaving Pittsburgh.

The Cardinals reportedly asked the Steelers permission to interview Haley on Thursday.

Haley served as head coach for the Kansas City Chiefs for a little over two seasons from 2009-11. Prior to that, he was offensive coordinator from 2007-08 in Arizona, in which his offense, led by quarterback Kurt Warner, caught fire as the Cardinals made it to Super Bowl XLIII. They wound up losing to the Steelers, 27-23, in Tampa Bay, Fla.