ALAMEDA, Calif. -- An MRI of fullback Marcel Reece's injured knee came back negative, running back Darren McFadden's strained hamstring remains a question mark and quarterback Terrelle Pryor has to be completely non-symptomatic from his concussion to play this weekend against San Diego.
And that's just taking into account the Raiders' starting offensive backfield a day after Oakland's gut-punch 24-14 loss to Washington.
But most eyes are on the legs and head of the Raiders' most explosive playmakers.
"It's really a matter of when's he going to be physically able to go," Raiders coach Dennis Allen said of Reece. "It's not a surgical procedure or anything like that that needs to be done. It's just, whenever he's ready to go."
As for the oft-injured McFadden, who has never played more than 13 games in a season and had missed 13 of Oakland's previous 32 games coming into this season, Allen would not go into detail regarding his latest injury, purportedly suffered on his first carry of the game.
"I wouldn't get into characterizing whether it's minor, major," Allen said. "He's got a hamstring [strain]. I don't expect him to be out a long time but we'll see how he responds. I mean, it's one day after a game."
Then, might McFadden play Sunday against the Chargers?
"Again, we're one day out, so I really don't know.
"We want to make sure that he's healthy. I think hamstring injuries and brain injuries are two totally different things but yeah, we want to make sure that Darren's healthy. We don't want this to be anything that's going to linger."
As far as Pryor, he was actually medically cleared to play against Washington, but Allen said the quarterback was still exhibiting symptoms, such as a sensitivity to light.
Pryor had requested a tinted shield for his helmet's facemask -- he was denied -- and the fact that Pryor wanted a visor set off warning bells for Allen, he said.
"When you have that symptom," Allen said, "we can't put him at risk."
A player, then, can pass the NFL's concussion protocol and still exhibit symptoms?
"Yeah, because part of the tests are objective, and part of them are subjective," Allen said. "We wanted to make sure we exercised extreme caution in his situation and we probably went a little bit above and beyond what the typical protocol would be and it was just deemed that it wasn't worth the risk."
And while Pryor, who was inactive Sunday and watched the game from the sidelines wearing dark sunglasses, would seemingly be ready to face the Chargers, Allen would not commit to him ... yet.
"The biggest thing is that he's got to be symptom-free," Allen said. "Whenever that point is. We're going to continue to monitor it until he's symptom-free."