IRVING, Texas -- The Dallas Cowboys' search for a new defensive coordinator is heating up.
They already have talked to Stanford defensive coordinator Vic Fangio about joining Jason Garrett's staff, according to multiple sources.
Another source said the Cowboys will interview San Francisco 49ers defensive coordinator Greg Manusky this week.
Manusky could be looking for work because Fangio also is a candidate to follow new 49ers coach Jim Harbaugh from Stanford to San Francisco.
Paul Pasqualoni was the Cowboys' defensive coordinator for the final eight games of the season after Wade Phillips was fired, but the Cowboys are looking for someone else to run their 3-4 defense.
Phillips tried to hire Manusky as defensive coordinator from the San Diego Chargers in 2007. When that attempt failed, he hired Brian Stewart, who was let go after two seasons.
Manusky played in the NFL for 12 seasons with the Washington Redskins, Minnesota Vikings and Kansas City Chiefs before retiring after the 1999 season. He's coached with the Redskins, Chargers and 49ers.
Manusky has an interview planned with the Arizona Cardinals for Tuesday, and he is expected to meet with the Cowboys by midweek.
Fangio, who has predominantly used the 3-4 scheme in his career, finished his first season at Stanford by helping the Cardinal to an Orange Bowl victory.
Fangio served as the defensive coordinator for the Carolina Panthers (1995-98), Indianapolis Colts (1999-2001) and Houston Texans (2002-05) and was an assistant to the head coach in Baltimore from 2006-08 before working with the Ravens' linebackers in 2009. The Ravens had a top-three defense in three of his four years in Baltimore.
While he does not have a direct tie to Garrett, Fangio worked under Dom Capers, who would have been Garrett's defensive coordinator had he taken either the Baltimore or Atlanta job in 2008.
Last week, the Cowboys interviewed Miami Dolphins assistant coach Todd Bowles, who also coaches defensive backs, for the head coaching position that went to Garrett. The Cowboys were also interested in Bowles as a defensive coordinator, and he attended Friday's Cotton Bowl with owner Jerry Jones and Garrett. Bowles, however, is still under contract to the Dolphins and might not be available.
Todd Archer and Calvin Watkins cover the Cowboys for ESPNDallas.com.