The Hogs, the linemen who have been the mainstay of the Washington Redskins' offense, have become "a real concern," offensive line coach Joe Bugel said today.

"It's frightening," Bugel said. "With the (knee) injury to (center) Jeff Bostic, we are really concerned about our depth. For now, we have only six veterans who have played at this level before. So we're really hoping somebody (among the rookies) comes to the front in the next week or so here."

General Manager Bobby Beathard said the Redskins are exploring the possibility of trading for an offensive tackle.

"Right now, we've run into five other teams trying to do the same thing," Beathard said. "If we played today, we would be in a very, very delicate position at tackle -- and in the whole line."

Bostic, who underwent reconstructive surgery on his right knee last October, has said he may miss at least the first four games of the season. His replacement at center is Rick Donnalley.

At guard are Russ Grimm and Ken Huff; at tackle Joe Jacoby and Mark May. They play musical chairs, serving as each other's backups along with 37-year-old tackle George Starke. The Redskins have been using two promising rookies -- 11th-round draft pick Raleigh McKenzie and free agent Mike Wooten, also a center -- at guard during camp.

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Coach Joe Gibbs said he was "disappointed" with the offense after watching the films of Wednesday evening's workout. But he didn't name names . . . The battle for No. 2 quarterback still is even, Gibbs said, despite the fact that Jay Schroeder continues to run the team in drills ahead of Babe Laufenberg. Gibbs said Laufenberg, who appeared to have some trouble throwing long Wednesday night, had one pass dropped on him.

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The Redskins lifted weights in the morning and practiced in a driving rain in the afternoon. After two practices Friday, the quarterbacks and rookies will fly to Foxboro, Mass., to scrimmage the New England Patriots' rookies Saturday at 1:30 p.m.