Santana Moss sat out Monday's practice due to a strained groin injury and his status for Sunday's game against the Detroit Lions is uncertain.

Moss suffered the injury in the Redskins' 24-17 loss to the New York Giants on Sept. 23. The Redskins had a bye last weekend, giving Moss time to rest the injury.

Head coach Joe Gibbs said Moss could be ready to start taking practice work on Wednesday.

"We will just have to see," Gibbs said.

Moss said the injury is "feeling better," but he still wants to be cautious with it.

"It's a long season, and I feel like I have to be smart with it, so that's what I'm going to do," Moss said. "I don't want this to continue to bother me [all season]. I'd rather just get this thing right."

Asked for his status for the Detroit Lions game, Moss said: "Who knows what will happen later on in the week? Right now, it's feeling better and we'll just go from there."

Added Jason Campbell: "Hopefully we can get him back for this week, but if he can't go, then we all understand. You don't want an injury to be nagging you all year long, especially when you are dealing with that kind of injury."

-- PORTIS MISSES, TOO

Clinton Portis has suffered a reoccurrence of the knee tendonitis that had bothered him through preseason, Joe Gibbs said.

Portis sat out Monday's practice.

Gibbs said Portis's knee started feeling sore after the Sept. 23 game against the New York Giants.

"It's still a little agitated," Gibbs said. "We'll see how it goes through the week here."

Portis was at Redskins Park during the bye getting treatment for the injury, Gibbs added.

Portis leads the Redskins' ground game with 48 rushes for 227 yards and three touchdowns.