The Raiders dropped two spots to No. 28 in The Associated Press Pro32 NFL power rankings after their 37-6 loss to the host Denver Broncos on Sunday.
Oakland had moved up four spots to 26th after beating the Pittsburgh Steelers on Sept. 23.
There's a decent chance the Raiders (1-3) won't lose any ground after their bye week as the four teams ranked below them all face opponents ranked in the top 14.
No. 29 Tennessee visits No. 14 Minnesota, No. 30 Jacksonville hosts No. 9 Chicago, 31. Indianapolis hosts No. 7 Green Bay, and No. 32. Cleveland travels to New Jersey to play the No. 11 Giants.
AP's NFL power rankings started this year and are based on voting from 12 media members.
What follows are the voters' comments on the Raiders after Week 4, as provided by the AP (voter affiliation and ranking in parentheses):
Chris Berman (ESPN, 24) -- Back to AFC West drawing board.
Clifton Brown (Sporting News, 32) -- Darren McFadden has been held to fewer than 35 yards rushing in three of the Raiders' four games.
Cris Collinsworth (NBC Sports, 25) -- Comment currently unavailable
Rich Gannon (CBS Sports/SiriusXM NFL Radio, 30) -- No team struggles to win two in a row more than the Raiders.
Bob Glauber (Newsday, 29) -- Raiders on pace to allow 500 points this season. Not quite the "pride and poise" this team used to be known for.
Rick Gosselin (Dallas Morning News, 24) -- The Raiders are one of four teams with a bye this week. That will give them time to figure out how to better incorporate Darren McFadden in the NFL's worst rushing offense.
Clark Judge (CBSSports.com, 28) -- No longer do the Raiders lead the league in penalties. So don't tell me they're not making progress.
Ira Kaufman (Tampa Tribune, 30) -- Something's awry in the East Bay when Darren McFadden is averaging 3.5 yards per carry.
Pat Kirwan (SiriusXM NFL Radio/CBSSports.com, 31) -- Peyton Manning dissected this defense last week and once again Darren McFadden couldn't get the running game going.
John Lynch (Fox Sports, 28) -- If you have any questions whether Peyton Manning can still play, ask the Raiders.
Alex Marvez (Foxsports.com, 25) -- Excluding a Week 3 home upset of Pittsburgh, the Raiders were dreadful in the second half of their three defeats. The pattern continued in Sunday's 37-6 loss at Denver.
Dan Pompei (Chicago Tribune, 27) -- Unless they figure out how to contain a premier quarterback, they have no chance.