The freshmen and reserves did most of the work yesterday as Maryland Coach Jerry Claiborne put his football team through its first preseason scrimmage.

Claiborne, saying he needed to get film of the freshmen and those players who have seen little action in the past, held virtually all his two- and three-year lettermen out of the morning workout.

That gave the freshmen hoping to get some varsity playing time this season a chance to show their wares to Claiborne and his assistants.

Three players seemed to catch Claiborne's eye. "The extra days with the youngsters before the varsity came back helped," he said. "Several of them have stood out in practice, especially defensive linemen Mark Duda and Scott Hayes and running back John Nash."

Claiborne added that he was pleased with the first week of practice. "We had a pretty good week," he said. "The weather helped as we were able to work harder and longer than it if had been hot."

The Terps are expected to hold their first full-scale varsity scrimmage next Saturday. The season-opener is Sept. 8 against Villanova.

Navy opened practice yesterday, planning to use the first three days of noncontact drills to reconstruct its passing game after the loss of three-year starting quarterback Bob Leszyznski.

Mid spokesman Tom Bates said the shorts-and-helmet workouts will give Coach George Welsh a chance to take another look at new first-string quarterback Bob Powers while also searching for a "definite backup candidate."

Welsh is also looking to replace graduated receivers Phil McConkey and Sandy Jones.

Virginia Coach Dick Bestwick opened camp with two-a-day, non-contact workouts Friday and is also focusing on his quarterback situation, where the front-runner is sophomore Todd Kirtley.

The Cavaliers' offensive line was also depleted through graduation and spokesman Doyle Smith said speed and strength tests run on freshman prospects this week will be closely analyzed.