If Arizona is Pittsburgh West, it appears as if Indianapolis will be Pittsburgh Midwest.
Steelers Envy appears to be running rampant in Indy.
Pagano, Arians and Butler all used to work together in Cleveland, making their reunion less surprising. Butler, who was said to be Steelers defensive coordinator Dick Lebeau's successor should he retire, is accepting a promotion, therefore, does not need the Steelers' permission to interview with another team.
Butler has been in charge of the famed Steelers linebackers since 2003, under then head coach Bill Cowher. He is one of the last remnants of the Cowher era, and was said to have been a favorite of owner Dan Rooney.
In that time, Butler has guided Joey Porter, James Farrior, James Harrison and LaMarr Woodley to pro bowls, and has overseen both Harrison and Woodley during a period where they've become the best tandem of pass rushers in the game.
His move is proceeded by former Steelers offensive coordinator Bruce Arians, who will be hired as Indianapolis' offensive coordinator as soon as Monday.
Pagano took over the Colts from his defensive coordinator position in Baltimore. He will continue to formalize his staff in anticipation of a completely new look for the Colts. Butler's experience and track record can be rivaled by few - if any - position coaches in the game, and along with the success he had in Baltimore, Indianapolis looks to be focusing on an aggressive defensive set-up.