Not even diehard fans truly expected the Raiders to pull off a huge upset Sunday at Baltimore against a Ravens team that had won 14 straight home games. But few expected the Raiders to suffer such a humiliating loss, falling 55-20 and tying the single-game franchise record for most points allowed. The Raiders fell to 3-6 and three games behind Denver in the AFC West. Next up, quarterback Drew Brees and the New Orleans Saints, who come to Oakland on Sunday. It doesn't get any easier.

Offense: C

Considering that the Raiders played without their top two running backs -- Darren McFadden and Mike Goodson -- they deserve credit for racking up 422 total net yards on offense and scoring 20 points. Quarterback Carson Palmer completed 29 of 45 passes for 368 yards and two TDs with one interception and a passer-rating of 95.4. WR Darrius Heyward-Bey had an impressive 55-yard touchdown catch-and-run, breaking safety Ed Reed's tackle. Wideout Denarius Moore caught a 38-yard TD pass. The Raiders rushed for only 72 yards, but fullback Marcel Reece did a decent job in his first career start at running back. He carried 13 times for 48 yards and caught seven passes for 56. Previous game’s grade: B-

Defense: F

One week after getting gashed by Bucs rookie Doug Martin for a Tampa Bay franchise record 251 rushing yards and four TDs, Oakland's defense was carved apart by Ravens quarterback Joe Flacco. He passed for 341 yards and three touchdowns, including a 47-yard strike to Torrey Smith. Early in the game, Flacco repeatedly targeted tight ends Dennis Pitta and Ed Dickson, who had little trouble getting open over the middle against the Raiders' coverage. Oakland held Ravens running back Ray Rice to just 35 yards on 13 carries, but Flacco simply took aim against an overmatched secondary. Previous game’s grade: F

Special teams: F

Where to begin? Well, Phillip Adams muffed a punt in the third quarter that Baltimore recovered at Oakland's 20, setting up a touchdown. Later in the quarter, Ravens punter/holder Sam Koch ran 7 yards for a touchdown on a fake field goal. Then in the fourth quarter, Jacoby Jones returned a kickoff 105 yards for a touchdown. The fact that Sebastian Janikowski made both of his field goals and punter Shane Lechler averaged 54.8 yards (47.6 net) couldn't keep this group from getting a failing grade. Previous game’s grade: C+

Coaching: F

The buck has to stop somewhere, and in the NFL, that's with the coach. Dennis Allen was hired in large part because GM Reggie McKenzie wanted a defensive-minded coach. He was Denver's defensive coordinator last season and had spent his entire NFL coaching career on the defensive side of the ball. The Raiders have allowed 97 points over the last two weeks. Neither Allen nor rookie defensive coordinator Jason Tarver has found a way to fix a defense that is clearly broken. Once again on Sunday, the Raiders were mauled in the third quarter. The Ravens outscored them 21-7 in the third. For the season, the Raiders have been outscored 109-31 in the third. Whatever adjustments are being made at halftime aren't working. Previous game’s grade: D

Follow Raiders reporter Eric Gilmore on Twitter @CBSRaiders.