Running back Darren McFadden, whose brief career has been met with as many disappointments as broken tackles, was dropped for another loss Monday.
Raiders coach Tom Cable said McFadden will be out two to four weeks with a knee injury and is scheduled for surgery today to repair a torn meniscus.
"That's this game," Cable said at his weekly press briefing. "It's going to do that to you once in a while."
The injury was a little mysterious in that Cable didn't know which knee was at issue, and that McFadden spoke with reporters after Sunday's 29-6 loss to the Houston Texans and never indicated anything was wrong.
Also lost from two to four weeks is starting right tackle Cornell Green, who left the Texans game with a calf injury in the second half.
McFadden carried six times for minus-3 yards and had one reception for 5 yards against the Texans. His last carry came with 11:02 remaining in the fourth quarter, a 1-yard gain when he was hit by Brian Cushing and Bernard Pollard. He caught a 5-yard pass from JaMarcus Russell with 8:06 to play.
The first running back chosen in the 2007 draft at No. 4 overall, McFadden played a supporting role behind Justin Fargas and finished sixth among rookie runners with 499 yards last season, in part because of turf toe injuries on both feet.
Named the lead runner by Cable at the close of training camp, McFadden looked the part in gaining 62 yards on 13 carries in the first half of the season opener against San Diego.
In the ensuing 14 quarters, McFadden has 34 carries for 83 yards and is ranked 39th in rushing yardage with 145 yards on 37 carries.
He has just seven receptions for 53 yards despite being considered a dangerous receiver out of the backfield and occasionally being split out as a receiver.
After the loss to Houston, McFadden discussed the frustration he feels over his lack of production but never let on he was injured.
"It gets very frustrating for you, but at the same time you want to keep your composure and just go out there and keep running the ball," McFadden said.
The Raiders expected their running game to be a strength after finishing sixth in rushing in 2007 and 10th in 2008. They currently rank 28th after four games at 88.8 yards per game.
Cable said he expects Fargas and Michael Bush to assume the workload in McFadden's absence.
Raiders assistant Randy Hanson was treated for a broken jaw, and his attorney told NFL.com his client had talked with police.
Cable has declined to comment on specifics since the incident became public on Aug. 11. "I know the truth and the process will take care of itself," Cable said. "I trust that."
Asked if it was true, Cable said, "I'm not going to talk about our internal stuff that way."
It was the first safety recorded against the Raiders on a running play since Nick Bell was dropped in the end zone in the Los Angeles Coliseum against Seattle in 1993.