Washington Redskins defensive tackle Tracy Rocker, saying he's feeling better by the day, is awaiting "the okay from the trainers" to start practicing again.

Rocker said his strained biceps are getting better each day and that he may not be sidelined much longer. "It feels a helluva lot better," he said, "and I'll go again when they give me the okay. I guess I really won't know anything until I get back out there and test it."

He has spent his days watching practice, jogging on the track around the field and lifting weights when not taking therapy on the arm, which he injured in practice last week.

"It's tough not to be out there," he said, "and they know I want to be back out there. I want to stay in shape as best I can when they give me the word." Jacoby Takes It Slow

Tackle Joe Jacoby, who returned to practice this week, won't play against the Steelers tonight. Jacoby, who underwent reconstructive knee surgery last November, has taken part in all but a few drills this week.

He's gradually getting back into shape and Coach Joe Gibbs said "the timetable is up to him. We'll give him as much to do as he feels comfortable with."

"Next week," Jacoby said. Grant Takes It Slower

Redskins General Manager Charley Casserly said he hasn't spoken to holdout defensive tackle Darryl Grant "in about a week." That's an indication of how stalemated the situation is, and at the moment, there are no signs either side is ready to concede anything.

The Redskins obviously feel they can survive the season without him and Grant clearly feels that the situation with their thin defensive line has increased his value.

He earned $357,500 last year. It's believed the Redskins have offered a package worth about $1.5 million over three years. Grant is believed to want approximately $2.1 million over three years. Odds and Ends

Plan B running back Tom Brown will undergo reconstructive surgery on his left knee today. He'll be lost for the season. Cornerbacks Brian Davis and D'Juan Francisco (knee), defensive end Fred Stokes and Rocker also will miss tonight's game. . . .

Steelers rookie quarterback Neil O'Donnell, a third-round draft pick from Maryland, ended his holdout last week but won't play tonight . . . This is the fifth straight year the Redskins and Steelers have played in the preseason . . .

The Steelers' preseason record under Chuck Noll is 63-39-1 . . . Noll needs seven victories to become the fifth NFL coach to win 200 games . . . Redskins quarterback Stan Humphries and Steelers quarterback Bubby Brister were teammates at Northeastern Louisiana . . . The Redskins haven't lost their first two preseason games since 1982. They started that season 0-4 in preseason and ended it by winning Super Bowl XVII.