The U.S. Olympic coxed pair of Mark and Fred Borchelt, brothers from Arlington, Va., and coxswain Chris Wells of Alexandria, Va., captured a bronze medal today in the Lucerne Invitational Regatta on the Rotsee track of Lurcerne today.

The U.S. men's eight finished secon to the East Germans for the second straight day and three Amerian women's crews were runners-up East Germans.

The impressive showing by the East Germans, who won 13 of 16 men's events, was enhanced by a field of 28 nations, more than in next month's Olympics in Moscow.

The Soviets, after the international rowing body Saturday suspended two Russian oarsman for use of musclebuilding anabolic drugs, withdrew at short notice, saying its oarsmen were out of shape.

The East Germans straight four made rowing history Saturday with the first sub-six minute clocking -- 5:59.18 -- for 2,000 meters. The East German eight defeated the Americans by four seconds.

Joan Lind of Long Beach, Calif., recorded her second runner-up finish in the single sculls behind East German Martina Schroeter. Canadian Andrea Schreiner won saturday with Schroeter finishing third.

In the double sculls, sisters Judy and Carlie Greer of Dartmouth University were second twice as was the Princeton University straight pair of Jeanne Flanagan-Cathy Thaxton.