NFC West: John Mitchell

Frequent coaching turnover is part of life in the NFL.

The Seattle Seahawks, St. Louis Rams and San Francisco 49ers have had 10 head coaches, interim or otherwise, since Arizona hired Ken Whisenhunt for the 2007 season.

Pete Carroll, Steve Spagnuolo and Jim Harbaugh remain from a group that has included Mike Holmgren, Jim Mora, Scott Linehan, Jim Haslett, Mike Nolan, Mike Singletary and Jim Tomsula. NFC West head coaches are set for 2011, but all four teams have staff openings.

As Qwest12thMan noted in the comments of an earlier item, the Seahawks are losing another high-profile assistant coach. Jerry Gray is leaving his job coaching the secondary to become assistant head coach and secondary coach at Texas, his alma mater.

Seattle has now lost offensive line coach Alex Gibbs, quarterbacks coach Jedd Fisch, defensive line coach Dan Quinn and Gray from Carroll's inaugural Seattle staff. Gibbs' departure affected the Seahawks' commitment to the specific zone-blocking scheme he promoted. The team wants a more consistent approach from training camp through the season, and coaching continuity should allow that to happen.

St. Louis remains without an offensive coordinator after interviewing former Denver Broncos head coach Josh McDaniels for the role. The Rams' staff could face additional changes if the team hires a coordinator from the outside. NFL Network suggests McDaniels could be headed to the Rams.

The 49ers have multiple positions open.

Arizona remains without a defensive coordinator, an indication Whisenhunt could be waiting for a candidate to become available following the playoffs. Whisenhunt's history with the Steelers makes Pittsburgh a logical place for him to turn, but linebackers coach Keith Butler might be off-limits. Ray Horton coaches the Steeler's secondary. Their line coach, John Mitchell, is also assistant head coach.

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