Earl Wolff participated in all of practice Thursday for the third straight day.

When players are full participants in practice all week, it usually signals a strong chance of playing.

For Wolff, not so much.

After practice, the rookie safety admitted that he’s still battling soreness in his knee and that he’s far from certain he can play Sunday against Dallas with the NFC East title hanging in the balance.

Given everything at stake, Wolff’s frustration has reached its peak.

“It’s killing me, man,” he said. “I want to be out there so bad, man. For real.”

Wolff, who against Chicago re-injured the right knee that caused him to miss four games, said he would probably be a game-time decision. He came out against the Bears on the first play of the second quarter, after breaking up a pass from Jay Cutler to Brandon Marshall.

Nate Allen and Patrick Chung started against the Bears, with Wolff mixing in as he played his first game since Nov. 10. If he’s not 100 percent by kickoff Sunday or if he’s ruled out earlier, Allen and Chung will start again.

“I’m just hoping and praying I feel great by Sunday,” he said. “You never know.”

Structurally, Wolff’s knee is fine. But the soreness he’s feeling at practice, he said, is severely limiting his impact and ability to make plays.

If he can’t make routine plays in practice, Wolff fears the same problem against Dallas in the most important game of the season.