All the principal characters in the continuing, ever-changing drama of the Washington Redskins offense were present and accounted for yesterday afternoon at Redskin Park.

Doug Williams was leading the team in practice and doing the most interviews afterward. Babe Laufenberg was receiving after-hours tutoring from quarterbacks coach Jerry Rhome. Jay Schroeder was watching in gray T-shirt and shorts. George Rogers popped outside for a peek, too. Kelvin Bryant was running with the ball. Keith Griffin was catching it. And Russ Grimm was snapping, back in his spot as first-string center.

Just about the worst thing that can happen to an offense in the National Football League happened to the Redskins last Sunday. They lost their quarterback, their center and their running back -- the heart and soul of their one-back offense -- in the first half of their first game of the season. Hours, days, even weeks of preparation for and around Schroeder, Rogers and Grimm went down the drain because of two sprained right shoulders and a strained back.

"It's the toughest thing in offensive football, interchanging parts during the season," said offensive assistant coach Dan Henning. "The only good thing is it happened in the first week, not in the middle of the season. The guys who came in had had a lot of work in preseason. It would have been different if we were well into the season."

Judging by how the replacements played in the team's 34-24 win over Philadelphia, the Redskins didn't have any trouble maintaining consistency and continuity after the injuries. "That's the difference between a playoff team and a regular football team," Williams said yesterday. "You can tell by how they keep rolling along."

Despite potentially debilitating injuries, the Redskins succeeded last week for different reasons at each position.

Williams, who threw for 272 yards and two touchdowns, is a 32-year-old, tried-and-true veteran. "I think the players respect Doug and like him," Coach Joe Gibbs said. "There he is, a 32-year-old, running the other team's plays {in practice as the No. 2 quarterback}. The other players see that and respect it. So when Jay goes down, instead of saying, 'Gosh, we're in trouble,' they say, 'Let's help Doug out.' "

In the team's pre-Bryant days, losing Rogers would have been much more serious. Plus, Rogers has been injured since Aug. 4 with a sprained left big toe and now, the sprained shoulder, so the Redskins haven't relied on him anyway. "It wasn't like the whole load was on him," said running backs coach Don Breaux.

The Redskins are alternating their backs this week: Griffin is likely to start, but Bryant will play often. Perhaps even rookie Timmy Smith will play. This is not to say the Washington running game is clicking. It's not. It produced only 110 yards last week, and 31 came on Schroeder's first quarter scramble that ended with a fumble.

The Redskins moved Grimm to center the first veterans' practice of training camp to beef up the offensive line. Jeff Bostic worked with the second team all summer -- and then regained his job in a split second on the field at RFK. To Williams, this hardly mattered. Each Washington quarterback takes snaps from each Washington center during practices, which is why Williams and Bostic did not have any apparent problems working together.

Grimm said yesterday he feels good and will start Sunday. "By the looks of things, I'm going to have a couple weeks off after this game to rest anyway," he said.

Often, when a team starts going bad, it's because of a change on the offensive line. But when the Redskins plugged Bostic into Grimm's spot, they were simply reuniting a former all-pro with his old job.

Witness the New York Giants' offensive line. Their starting five linemen didn't miss a snap in 1985 or 1986 and the Giants had their two best seasons in two decades. When Karl Nelson was diagnosed as having cancer this summer, William Roberts was moved to his right tackle position. Is it a coincidence the Giants gave up eight sacks to Chicago Monday night, the most sacks they have given up in 19 years?

"Hopefully, we'll continue to mesh well," Henning said. "We are on the ragged edge right now. If anything happens to any of our new starters . . ."

In Atlanta, where the Redskins play Sunday at 1 p.m., some Falcons defenders believe the Redskins will have problems with Williams as their quarterback. "He doesn't like pressure," defensive end Rick Bryan told the Atlanta Constitution. "You get pressure on him, you can make him mess up. He can be rattled. He doesn't like to be hit . . . He has a heckuva arm, but if you get a few licks on him, he has a tendency to start hurrying his throws."

Added nose tackle Tony Casillas, "If we can keep hammering him all day, we can make him throw the ball when he doesn't want to."

Informed of the comments from Atlanta's starting front three, Williams said, "They're nice guys. To each his own."

Redskins Notes: Defensive tackle Darryl Grant (pulled right calf muscle) did not practice after apparently aggravating his injury. Dean Hamel replaced him. Grant's status for the Atlanta game is uncertain.