Bobby Beathard, the Washington Redskins' general manager, vowed yesterday that he won't trade quarterback Doug Williams -- not today, not tomorrow, not July. He also said the same for quarterbacks Jay Schroeder and Mark Rypien, which can only mean a crowded Carlisle next summer.

In a sense, this was Beathard's way of handing out votes of confidence at a queasy time of year. With the playoffs about a week away, the Redskins have benched Schroeder and elevated Williams, leaving each man's status way up in the air. Williams, for instance, said just recently that he expected to be traded, but that was before he regained the starting job. Schroeder said yesterday he has "no idea" what the organization thinks of him and "can't worry" about it.

"I don't try to judge that," Schroeder said yesterday at Redskin Park. "I just go out and do what I can do. And if it's good enough, it's good enough. If it's not good enough, hopefully I'll impress somebody else."

Beathard made it clear that his decision to keep Williams has nothing to do with Schroeder's rocky season. Instead, Beathard said he made up his mind last August and September that trading Williams wouldn't be wise. He said he did talk about trading Williams to the Los Angeles Raiders last summer, but said, "They weren't going to give us a one {a No. 1 pick}, and we knew they weren't going to give us one."

The main thing, Beathard said, was that he wanted -- and still wants -- three quarterbacks for insurance. Even if some team makes a tremendous offer for one of them this offseason, he said his inclination is to say no thank you.

"I'd say our energies will be spent finding players at other positions," he said. ". . . We know how quickly your season can end by having a quarterback injury. We feel fortunate we have three quarterbacks with the ability each one has. I think we're better off this way."

In the meantime, Beathard went out of his way yesterday to show his approval of Schroeder, although he admitted "maybe we were spoiled" by Schroeder's fast start in 1985 and 1986.

In fact, both Beathard and Schroeder pointed out yesterday that Schroeder is young in terms of games played, even though he's been in the NFL four seasons.

"I don't forget," Schroeder said when asked if people forget he's inexperienced. "I've been reading that seasoned-veteran crap" -- he paused and laughed -- "I played in 11 games in college, and all of a sudden I hear that. God dawg, I had nothing to do with that. That was in the papers. I knew better. I told you all last year. You kept asking me, 'Is it that easy? Is it that easy?' 'Forget it,' I'd say. 'Wait until it falls.' I said that, didn't I?"

Beathard said: "Because he was successful early when he stepped in, we expected him to be a star right away, and -- at that position -- it's very, very rare that it happens that way. Because he's having problems now, maybe we should have expected this rather than be so surprised."

Schroeder said that the first thing he'll do after the season is rest his right shoulder. Quarterback Coach Jerry Rhome agreed that he thinks the shoulder -- which was jammed in the season opener against Philadelphia -- has bothered Schroeder "from time to time" and might have affected his passing. For whatever reason, Schroeder's completion percentage dropped from 53.6 in 1985 to 51.0 in 1986 to 48.3 percent in 1987, and -- at times in practice -- he continually sails passes over receivers' heads.

On whether the shoulder affected his accuracy, Schroeder said: "Could have. I know it's sore during games."

And on the future of his shoulder, he said: "Yeah, it's going to bother me until I get done playing football. That was a given the minute I got hurt."

By Schroeder's figuring, he'll take about three months off after the season and then resume throwing. In the meantime, he admits, "it's going to take some time in the offseason" to get rid of "all the bad habits."

For the first time yesterday, he admitted what he needed to work on. "My bad habits? Not moving your feet when you stay up in the pocket," he said. "Or standing flat-footed in the pocket. There's all kinds of little drills that you can do to help yourself. It's just little things like that, that over the course of the season, you just don't have time to do. You should, but you don't a lot of times because you're beat up, and you don't really care to."

It appears Schroeder's problems are physical -- not mental -- because Rhome, for one, says Schroeder is an excellent student of the game. Rhome holds an annual three-week camp for the Redskins quarterbacks in the spring, and he gives them 45-minute written tests each day. They diagram defenses and schemes, and Rhome said last year's final exam took two hours and 10 minutes.

"Jay's a top student," Rhome said yesterday. "If he's not making 100s, he's making a 99 or a 98."

Schroeder says a new contract and a new restaurant and new-found fame had nothing to do with his drop-off this season. "I think I worked last offseason," he said. "I probably worked harder this year in training camp than last year, because I realized I was going to have to live up to what I did last year."

Beathard says Schroeder must work just as hard this offseason.

"If anyone comes and watches Jay Schroeder or works him out, there's no question he has the physical tools," Beathard said. "He can do whatever you want. He does have shortcomings now, but I think it's just a lack of experience. Maybe, just this past season, he's realizing what his shortcomings are, and I think he'll work at it.

"I think he wants to be good too badly not to work at it. The main thing, though, is whether he can remain in a state of mind where he's not doubting his ability."

With Schroeder, that's apparently the question. He stands there and says he's as confident as ever, yet no one gets benched twice and doesn't doubt himself. Schroeder admits that much. Point is, Beathard hopes he doesn't doubt himself too much.

"He says he hasn't lost confidence," Beathard said. "I don't know if he has or not. I can't read Jay's mind. I think Jay's an upbeat type of guy. I don't hear many negative comments from Jay. It's always, 'Everything's going to be okay; I'm going to do this; everything's fine.' I don't know if that's real or that's just his personality. So if he does have a lack of confidence in himself because of what's happened, he's either hiding it or he really doesn't."

Beathard also said he and others in the organizaton haven't sat up at night wondering if Schroeder was a fly-by-night success.

"I can speak for myself -- and I haven't heard anyone else say it -- that I haven't ever looked back and said I think maybe this isn't the kind of guy we thought he was," Beathard said. "In fact, he could end up playing in the playoffs. Who knows what'll happen in the playoff game? I expect Doug to play well, but I liked what I heard Jay say, that he'd be ready when we need him. I think he means it.

"This is so early in his career. Maybe we were spoiled by his success. If he was spoiled by his early success, I don't know. I can't tell you. But maybe we were."