ALAMEDA — Back-to-back wins against division rivals generated talk that the Oakland Raiders had turned things around under first-year coach Lane Kiffin.

A blowout loss in the cold of Green Bay quickly put that talk on hold, forcing the Raiders to regroup for a difficult season-ending three-game stretch.

“It’s frustrating because we had come off two games, and we were riding high, and the team was feeling good,” quarterback Josh McCown said Monday. “To have that happen the way it did was a bummer. So we have to get retooled and get back going.”

The Raiders (4-9) had beaten Kansas City and Denver the previous two weeks, ending a 17-game losing streak against AFC West foes and putting together their best back-to-back games in years.

Then came the 38-7 loss in Green Bay, Oakland’s most lopsided loss in three years and the first game this season that the Raiders had no chance to win in the fourth quarter.

Even during a six-game losing streak earlier this season, Oakland was almost always competitive. Their largest margin of defeat during that stretch was a 28-14 loss at San Diego. But even in that game, Oakland was down only seven points late in the fourth quarter.

Against the Packers, the Raiders fell behind 31-7 in the third quarter and never threatened after that.

“Most teams around the league have one or two of those, and unfortunately we had one,” Kiffin said. “Now we have to deal with it. The whole key is going to be for it not to beat us next week.”

It doesn’t figure to get much easier in the final three weeks of the season for the Raiders (4-9), who finish the year with three probable AFC playoff teams. Oakland hosts Indianapolis (11-2) on Sunday, before traveling to Jacksonville (9-4) and hosting San Diego (8-5).

To have any chance against those three AFC powerhouses, Oakland will have to do much better than it did against Green Bay.

The Raiders committed nine penalties for 62 yards, had three turnovers, managed only 10 first downs and had their second worst offensive output of the season with 233 total yards.

After gaining 328 yards rushing in the wins against Kansas City and Denver, Oakland was held to 85 yards on 28 carries against the Packers.

“It was just the situations that we put ourselves in during the game with penalties and things like that setting ourselves back,” running back Justin Fargas said. “We couldn’t get in a rhythm where we could consistently stick to running the ball.”

They also gave up 445 yards to the Packers, including 179 on the ground, and allowed a pair of touchdowns on special teams in a loss that could be blamed on all three units.

“We need to learn from those and not let them happen again and come back and play well this week,” Kiffin said. “It can go either way. A good example is Minnesota. They went into Lambeau five weeks ago and I think it was 34-0 they got beat in all phases of the game. Since then, they’ve won four straight, and they’re playing very well. You can come back from things like this.”

If the Raiders are able to bounce back this week, No. 1 overall draft pick JaMarcus Russell could play a role. After having a successful debut when he played two series on Dec. 2 against Denver, Russell sat out the entire game against the Packers as Kiffin chose not to insert him late into a cold-weather game where Oakland’s line had been struggling.

But Kiffin said Monday that Russell will play again as a reserve this week against the Colts.

“He’ll play in some role,” Kiffin said. “The length of that role I haven’t determined yet. But he’ll play.”

Kiffin said he would wait until at least Wednesday to determine whether McCown or Daunte Culpepper will start the game. Culpepper has missed the previous two weeks with a sore right quadriceps and McCown has been bothered by two dislocated joints on his non-throwing, left pinky.

Fargas, who left Sunday’s game in the third quarter with bruised ribs, said he expected to play this week against the Colts.