One of the names that has been mentioned as a possible Detroit Lions offensive coordinator candidate is Indianapolis Colts quarterbacks coach Clyde Christensen. But Colts general manager Ryan Grigson told local reporters no team has requested permission to talk to Christensen about a job opening.

Christensen and Caldwell's working relationship goes back more than a decade, starting in Tampa Bay in 2001. Most recently, Christensen served as Caldwell's offensive coordinator in Indianapolis from 2009-11.

Christensen was one of the few assistant coaches retained when Chuck Pagano took over for Caldwell in 2012, but the coordinator was demoted to quarterbacks coach. He's worked with No. 1 draft pick Andrew Luck the past two seasons.

The only other person who has been reported as a possible offensive coordinator candidate in Detroit is Kansas City Chiefs wide receivers coach David Culley.

Caldwell's staff should come together quickly over the next several days. The team has already reportedly reached an agreement with Baltimore Ravens defensive backs coach Teryl Austin to join the staff as defensive coordinator.

Just because the Lions haven't requested permission to interview Christensen yet, doesn't mean he won't wind up in Detroit. Considering the previously established relationship with Caldwell, getting permission would merely be a formality.

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