The Bills have filled their OC vacancy, but the team still has to find a new defensive coordinator. That search has included a meeting with a familiar face for head coach Sean McDermott. 
The Bills interviewed Mike Caldwell for their defensive coordinator vacancy, Mike Garafolo of NFL Network reports. Caldwell was one of many defensive staffers let go by the Jaguars at the end of the campaign, one in which Jacksonville fell short of expectations on both sides of the ball en route to missing the postseason. He has nevertheless received coordinator interest in this year’s hiring cycle.
Caldwell interviewed with the Eagles for their DC posting, which has since gone to Vic Fangio. He has also met with the team over the linebackers coach position, however, so a deal sending him to Philadelphia could still be in the cards. Caldwell will have at least one alternative if his Bills meeting produces an offer. In that scenario, he would reunite with McDermott.
The pair were together during Caldwell’s playing days with the Eagles, and again when the latter was a member of Philadelphia’s coaching staff. Taking on Buffalo’s DC position would thus allow for another shared tenure with McDermott and give Caldwell, 52, the opportunity to work with a unit featuring signficant expectations.
The Bills’ perceived Super Bowl window has been in place in part due to the team’s high-profile defenders in recent years, though the unit has underperformed at times. Buffalo put up strong numbers in several defensive categories this season, one in which McDermott took on play-calling duties in response to Leslie Frazier stepping away from coaching. Roster changes will no doubt take place in the near future, but Buffalo will again enter the campaign with visions of a deep playoff run, something its defense will be significantly responsible for.
Caldwell joins ex-Eagles DC Sean Desai in interviewing with the Bills for their opening. The latter was also dismissed at the end of the campaign (although by that point he had already been replaced as Philadelphia’s play-caller). Several coordinator postings have already been filled, but a number of other candidates are still available to meet with the Bills as their search continues.