For the second time in three years, Denver may lose a defensive coordinator to Oakland.

The Raiders officially asked permission to interview Broncos coordinator Jack Del Rio last night, according to ESPN's BIll Williamson. The interivew, per Williamson, could happen as early as today.

Del Rio seems poised to become Oakland's next head coach, as Williams tweeted that he "really wants the job" before going on to write that Del Rio is covetting the position.

Del Rio, of course, is from the Bay Area and his parents are Raiders season-ticket holders (Thanksgiving must have been awkward the past three years).

Williams pointed out that Raiders owner Mark Davis sought out Del Rio on the field prior to Denver's season finale against Oakland. Del Rio is, according to Williams, Davis' top choice.

Del Rio's defense ranked third this season and 14th in 2013. He served as an interim head coach last year when John Fox was sidlined due to medical reasons. He went 68-71 as a head coach with the Jaguars. Jacksonville has gone 9-39 since Del Rio moved on.

The last Broncos defensive coordinator to go on to coach in Oakland, Dennis Allen, went 8-28 before being fired four games into the 2014 season. Tony Sparano served as Oakland's interim head coach, finishing the season 3-9.

Allen's failure in Oakland is no reason to write off Del Rio, says Williams.

Also, for those wringing their hands over the fact Del Rio is Broncos DC like Dennis Allen was, well, stop. Two different people. #Raiders — Bill Williamson (@BWilliamsonESPN) January 3, 2015

Unlike Allen, Del Rio already has head coaching experience. Still, Oakland is coming off its worst season since 2006. If Del Rio accepts the job, his work will be cut out for him.

Meanwhile, Denver's offensive coordinator, Adam Gase, has received interest from four teams: Buffalo, Chicago, Atlanta, and San Francisco. Gase is expected to conduct interviews this weekend.

When the 2015 coaching carousel finally comes to a halt, Denver may be without coordinators on both offense and defense. The Broncos went 25-7 with Gase and Del Rio.