In Week 15 against the Philadelphia Eagles, the Las Vegas Raiders literally set offensive football back multiple decades. Not only were they shut out, they netted just 75 yards of offense. The only other time in franchise history they did this was in 1961, before the AFL-NFL merger.
According to the Associated Press's Josh Dubow, the Raiders are also the first team in the Super Bowl era with six straight games where they allowed four or more sacks while also rushing for less than 75 yards.
That level of ineptitude has many tentacles, and, if anything, it's gotten worse since offensive coordinator Chip Kelly was made a scapegoat for it.