"Alluding to long-term stability, Steelers president Art Rooney II said, "I think it was time for a change" when talking about the sudden departure of offensive coordinator Bruce Arians.

In an interview on the team's website Wednesday, Rooney gave at least one reason why Arians won't be back next year — instability.

"Bruce talked about retiring for a number of years now," Rooney said. "We are looking to improve on offense and to have somebody in place for a number of years. We are looking forward to moving on.""