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Dolphins open up coordinator search

Al Groh seems like a common-sense fit for the Miami Dolphins' defensive coordinator vacancy.

He's available. He has a long and successful history with Dolphins football operations boss Bill Parcells.

Fact of the matter is, Tony Sparano's the head coach. And maybe he wants to look around first.

Multiple outlets report the Dolphins will interview Pittsburgh Steelers linebackers coach Keith Butler for the job created Monday, when the Dolphins fired Paul Pasqualoni.

Sparano knows Butler from the two years they spent together on the Cleveland Browns staff under Chris Palmer. Sparano was the offensive line coach, while Butler handled linebackers.

Butler has been considered the heir to legendary defensive coordinator Dick Lebeau. But LeBeau has agreed to return to the Steelers next season, and Butler might be getting itchy. Steelers head coach Mike Tomlin's staff has undergone some turmoil after the defending Super Bowls champs failed to make the playoffs.

Butler has coached linebackers for Pittsburgh since 2009. His pupils incluse Dolphins outside linebacker Joey Porter plus Clark Haggans, James Farrior, James Harrison and LaMarr Woodley.