The San Francisco 49ers are in the midst of their search for an defensive coordinator, as the organization looks to assemble its entire coaching staff under new leading man Jim Tomsula.
Ten other NFL teams have either filled or are also in the process of filling their "DC" positions.
Here are where those teams stand:
RELATED: Every New Offensive Coordinator
**
**
1. Buffalo Bills
Former coordinator: Jim Schwartz
New coordinator: Dennis Thurman
Schwartz left the team when former head coach Doug Marrone opted out of his contract. New head coach Rex Ryan and Schwartz explored the option of joining forces, but Schwartz's contract was terminated after their meeting. Thurman served as Ryan's DC in 2013 and '14 with the New York Jets.
2. Chicago Bears
Former coordinator: Mel Tucker
New coordinator: Vic Fangio
Tucker served as the play-caller under Marc Trestman's regime in Chicago. When Trestman was fired, he was out the door, too. Fangio, meanwhile, coordinated the 49ers defense for four seasons in 2011, routinely ranking among the NFL's best units.
3. Denver Broncos
Former coordinator: Jack Del Rio
New coordinator: TBD
Del Rio was John Fox's DC in Denver for the past three seasons. Not long after Fox and the Broncos agreed to mutually part ways, Del Rio became the Oakland Raiders head coach. New Broncos leading man Gary Kubiak has yet to hire his new play-caller.
**
Mike Holmgren, Mike Shanahan, Jeff Fisher, Pete Carroll and others all once graced the San Francisco sideline.
George Seifert, Bill Walsh
- Atlanta Falcons**
Former coordinator: Mike Nolan
New coordinator: TBD
Atlanta is rumored to be preparing a coaching staff that will be led Seahawks DC Dan Quinn. As a defensive-minded coach himself, it remains to be seen who Quinn would hire as his play-caller, what with the under-contract Nolan reportedly exploring other opportunities around the NFL.
5. Oakland Raiders
Former coordinator: Jason Tarver
New coordinator: TBD
Jack Del Rio he has yet to pick the leader of his defense. Tarver, who served in that role for the Raiders for the past three seasons, has been rumored to have joined the 49ers staff in another defensive role.
6. New York Jets
Former coordinator: Dennis Thurman
New coordinator: TBD
With Thurman joining Ryan in Buffalo, it's still unclear who Arizona Cardinals DC-turned-Jets head coach will have manning his defense in New York. The search continues.
7. Arizona Cardinals
Former coordinator: Todd Bowles
New coordinator: TBD
Bowles, who coordinated one of the NFL's best defenses in Arizona in 2014, will not be easy to replace. Cardinals head coach Bruce Arians is in the process of trying to do just that.
8. New York Giants
Former coordinator: Perry Fewell
New coordinator: Steve Spagnuolo
After a tough season in the standings, Fewell was let go five years into his run as the Giants DC. Spagnuolo regains the position he held in 2007 and '08 under New York head coach Tom Coughlin.
9. Pittsburgh Steelers
Former coordinator: Dick LeBeau
New coordinator: Keith Butler
LeBeau and the Steelers agreeing to mutually part ways left a big hole on the staff, but Pittsburgh filled it very quickly by promoting veteran assistant Keith Butler, who spent 12 seasons as the team's linebackers coach.
10. Washington
Former coordinator: Jim Haslett
New coordinator: Joe Barry
Barry is coming off of four seasons as the San Diego Chargers linebackers coach. Haslett held the job for four seasons in Washington before he and the organization agreed to mutually part ways.
