Washington Redskins Coach Joe Gibbs said yesterday that in spite of quarterback Jay Schroeder's poor performances two of the last three games, he did not consider pulling him out of Sunday's game at Philadelphia and will start him this Sunday at home against Detroit.

But Gibbs and his coaching staff have made a different decision on the future of veteran offensive lineman Jeff Bostic. With center Russ Grimm out with a knee injury for at least a month, the team plans to keep Raleigh McKenzie at center and use either Ed Simmons or Darrick Brilz, two rookies, at guard. Bostic might work a bit as backup guard, but he clearly is no longer in the Redskins' plans.

"It's not a demotion for Jeff, but Bostic's best value to the team will be as the long-snapper," assistant head coach/offense Joe Bugel said yesterday at Redskin Park.

"I'll have to wait and see what happens this week before I make any comment," Bostic said.

Gibbs spent most of his time in his news conference yesterday tangled in questions about his quarterback, who had his worst day as a Redskin in the team's 31-27 loss at Philadelphia. Gibbs acknowledged that Schroeder's problem is accuracy. He has completed just 40 percent of his passes this season, down from 51 percent last year. Against the Eagles, he overthrew open receivers nine times. He had two passes intercepted and threw four passes into the hands of defenders who dropped them.

"You can call it a lot of things -- a slump, a bad day," Schroeder said last night at Redskin Park. "Hopefully, it's over."

Gibbs said the reasons for Schroeder's drop in accuracy could be twofold: he sprained his right shoulder early in the season opener and could not throw for several weeks, and the strike disrupted his comeback.

Schroeder agreed.

"I tried to rush myself back to be ready to play," he said. "Whether I went too fast, I don't know, but, obviously, {the completion percentage} is not like what it's been in the past. It could be a little rustiness. We were off for four weeks and then came right back in."

Schroeder said he could not explain missing so many receivers, then hitting Gary Clark for a 47-yard touchdown late in the game. "You miss by six inches, you miss by three feet. I don't know why it's happening."

Schroeder completed only 16 of his 46 passes at Philadelphia and only 15 of 38 against the New York Jets two weeks earlier. In between was an 11-for-18 day at Buffalo. Gibbs, who is known for maintaining loyalty toward his quarterback, said the situation is not good, but he is not tempted to make a change at this point.

"I'm always reluctant to change the quarterback and before I change, it will be a good solid reason to do so and I'll go week to week on how I feel," Gibbs said. "Any time a player is not playing well, I don't care who he is on our team, he knows that and everybody else does too. There's more likelihood that you would do something {when a player is not performing well}.

"But because I'm normally very reluctant to do that, that doesn't mean I'm afraid to do it with anybody. If I think it's time in a game or before a game or at any other time during the week during preparation, if I analyze it and feel for the team's benefit we'd be better off doing something else with any of our players, I'd tell them."

Two seasons ago, Gibbs stuck with Joe Theismann for 11 games, until he broke his leg, even though the veteran quarterback was not playing well. Asked if his time frame for Schroeder is the same, Gibbs said, "I don't know if I could ever give you a time."

Schroeder said he would be "very hesitant" to pull himself out of a game. "I'm a competitor," he said. "We've pulled games out before, and there was no reason we could not pull that one out."

A fumble by Kelvin Bryant ended the Redskins' last-minute possession.

Gibbs said Schroeder's history of rallying is why he stays with him. "I don't think we'd have some of the wins we've had in the past if I'd have changed," Gibbs said.

Gibbs did say he was a bit more likely now to consider a change to backup Doug Williams -- but not much. "Anybody's play, if it's not as good, opens the door," Gibbs said. "If you're not playing as well, everybody knows that."

And Gibbs said there will be more pressure on Schroeder to perform well this weekend at RFK Stadium against the Lions than there was before.

"Anytime a quarterback, or anybody else, doesn't play well, the pressure goes up," Gibbs said. "It's very serious for us. We want to beat Detroit and play great. Anytime a player, particularly a quarterback, doesn't hit things he should hit, the pressure goes up."

It has been a difficult season for Schroeder in many ways. In addition to the injury, he lost as much as $250,000 from his nearly $1 million-a-year contract during the strike. He was voted co-assistant player representative by his teammates, but preferred to keep a low profile during the strike. He did not show up at the rally in front of RFK Stadium at the first replacement game. He later was shouted down in one union meeting, a team source said, apparently because some of the players were upset he stayed in telephone contact with Gibbs. Player representative Neal Olkewicz said, "Several players were shouted down in those meetings."

Schroeder said he doesn't believe there has been any carryover from the strike among the players.

Schroeder also recently opened a restaurant in Northern Virginia called Jay Schroeder's All-Pro restaurant, even though Schroeder has never been an all-pro. (He did make the Pro Bowl last season.) He has been spending time there recently, but he said that has not been a factor in his recent performance.

"Everybody's worried that I'm always down at the restaurant," he said. "I'm there after the game and on Tuesday, which is our day off. But I've been there only one Tuesday since it opened. I'm doing the same things I've always done. I take films home and watch them. Nothing has changed."

Gibbs said he has seen no signs that Schroeder has been distracted by his outside interests.

The only injury the Redskins were reporting yesterday was Grimm's. The four-time Pro Bowl selection was scheduled to undergo an arthroscopic exam on his left knee today at Arlington Hospital and will wear a brace for two weeks, head trainer Bubba Tyer said. He suffered a partial tear of the medial collateral ligament in the knee against the Eagles.