Linebacker Monte Coleman's sore right hamstring appears to be the only serious injury out of the Redskins' 26-13 loss to the San Francisco 49ers on Sunday.

Trainer Bubba Tyer said Coleman probably wouldn't be on the practice field when the Redskins return to work on Wednesday, but that he likely would play Sunday against the Dallas Cowboys at RFK Stadium.

"We'll do some therapy and rehab this week and try to get him ready," Tyer said.

The injury list is remarkably short considering the Redskins played a game that included two concussions (Jeff Bostic and Markus Koch), a gruesome dislocation of a finger (Earnest Byner) and dozens of other bumps and bruises.

"It was a tough game and if you'd asked the 49ers they'd probably say the same thing," Coach Joe Gibbs said. A New Diet

Defensive lineman Eric Williams, acquired last week from the Detroit Lions, was put on the two-man inactive roster for Sunday's game. The decision was made because Fred Stokes had a good week of practice despite a sore left shoulder and because Williams was so new to the system.

"I don't see any reason why I won't play next week," Williams said. "They told me that to have me out there, they'd have to leave off a special teams player and that was one of the things they wanted to emphasize."

Williams said he still enjoyed the trip "because I got a chance to see what the road routine is for my new team. Now, I have to find out how to get to {RFK} Stadium."

The difference in the routine? "Well, one thing I noticed Saturday night is the Redskins don't have sauce with their spaghetti," he said. "We had a tomato-based sauce in Detroit. There's some belief that some herbs hinder performances and a lot of teams don't have sauces. Maybe that's why the Lions didn't win more." Wallace Wins One-on-One

One of Sunday's mismatches was supposed to be 49ers tackle Steve Wallace against Redskins end Charles Mann. Wallace had a terrible week against the Saints and the early thought was that he'd be manhandled by Mann.

He wasn't. Mann was credited with one hurry, but didn't come close to sacking Joe Montana. "I feel a lot better about myself," Wallace said. "Charles Mann tried to put his head in my throat on every play. I have a lot of respect for that guy. He never stopped battling, and it was really physical."

Mann said the same thing and complained to the officials because he thought Wallace used his hands (to the face and the body) a little more than the allowed.

"He'd grab me, roll me on him, everything," Mann said. "The frustrating thing is that even when you get past him, Montana has already let the ball go. You just have to put one like this behind you and hope we get another chance against these guys."

Statistically Speaking

Mark Rypien may not have played his best game, but he didn't have much field position, either. The Redskins got the ball only twice outside their 40 and their first four possessions were at their own 20, 20, 14 and 17. . . . The 49ers were no better, but they moved the ball. In their 10 possession, they moved it at least 59 yards six times and that's why the time of possession was a lopsided 35 minutes to 25. . . .

Rypien was three of 11 for 69 yards on third downs. A week earlier against Phoenix, he'd been six of 10 for 57 yards. . . . The Cowboys have gone 2-2 against the Redskins since the start of the 1988 season. They're 3-27 against the rest of the NFL. . . . The Redskins have 35 first downs, but only nine have come on the ground. They're also the only NFL team without a turnover. . . .

Gary Clark needs two catches to move into fifth place on the Redskins all-time receiving list. He has 271. Hugh Taylor had 272.