Before Jack Del Rio has even been officially announced as Raiders next head coach, he has already been hard at work to put a staff together. He's been recruiting former Chicago Bears head coach, Marc Trestman to join him in Oakland. One would presume if he could get some kind of commitment from Trestman, it would up his stock as a head coaching candidate during interviews.
Trestman was with the Raiders back in 2001, originally as a quarterbacks coach and was promoted to offensive coordinator in 2002 when the staff was shaken up with the trade of Jon Gruden to the Buccaneers.
Under Trestman as OC and Bill Callahan as head coach, the Raiders had the best offense in the NFL. Rich Gannon was named league MVP and the Raiders went to the Super Bowl.
After a stop with the Dolphins, Trestman eventually was hired on to the be head coach of the Montreal Alouettes of the Canadian Football League. He led the Alouettes to three-straight Grey Cups, winning two in a row (2009-10).
This caught the attention of the NFL and he was hired on as Bears head coach where he was for two seasons before being fired this off-season.
Trestman is widely considered one of the best offensive minds in the NFL. He is the top name out there for teams looking for a new offensive coordinator. He is also currently being courted by the Cleveland Browns who just saw Kyle Shanahan resign his position after just one season on the job.