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ALAMEDA — The Raiders may have made the playoffs for the first time since 2002, but there remains a large segment of the fan base frustrated by the work of coach Jack Del Rio’s coordinators.

Oakland was back in the postseason despite finishing 26th in the league in total defense, allowing 375.1 yards per game. They were 20th in the league in scoring defense, surrendering an average of 24.1 points.

Could second-year defensive coordinator Ken Norton Jr. be on the hot seat? Del Rio didn’t offer any clues on Sunday.

“We’ll see how it goes,” Del Rio said of keeping his assistant coaching staff in tact for a third year. “Opportunities come up for guys. We were able to get that done last year and we’ll see how it breaks for us this year. We’ve got a good group of guys, they work hard, they care. We’ll see where that goes.”

Del Rio was critical of the Raiders’ penchant for allowing explosive plays and their significant lack of an interior pas rush that factored into them finishing last in the league in sacks despite the presence of Khalil Mack (11.0 sacks) and Bruce Irvin (7.0).

As for offensive coordinator Bill Musgrave, the complaints about him going too conservative on offense are less valid. The Raiders had the NFL’s sixth-ranked unit and were seventh in scoring. Before Derek Carr’s injury, they were an elite group capable of a Super Bowl run.

Del Rio’s referenced some of the hand-wringing from the fan base when asked if he was pleased with the strategic moves by both coordinators this year.

“People always want to get into playcalling,” Del Rio said. “That’s the first area that everybody that plays Madden thinks they have it figured out. I can’t worry too much about those types of things.”