Marty West of Columbia Country Club , gunning for his third straight Maryland Amateur title, won two tense matches today at Green Spring Valley and gained Saturday's quarterfinals.

West turned back Charles Harris of the Country Club of Maryland, 1 up, in the morning and won his afternoon match against Tom Loveless of Argyle with par on the first extra hole. West faces Frank Bart of Hillendale, who eliminated Paul Ryan, in Saturday morning's first quarterfinal at 8:30.

Loveless birdied the 16th and 17th holes to even the match with West. Then West had a chance to put it away on the 18th hole, but three-putted from 25 feet to send the match to an extra hole.

West said the windy conditions exhausted him mentally and physically, causing a lapse in concentration as he left his approach putt five feet short at 18.

"I had to play all the holes today," said West. "I need to get off my feet and relax."

Relaxed was Gary Marlowe of Woodmont, who was two under par for the day in breezing over Bob Lee of Rolling Road, 5 and 4, and Mark Bader of Montgomery Village, 8 and 6. Marlowe faces Chuck Ebner of Country Club of Maryland in his quarterfinal.

The remaining quarterfinals send Tony Ciconte of Columbia against Dave King of Bethesda, and Butch Clemmens of Country Club of Maryland against veteran Perky Cullinane of Columbia.

Clemmens staved off Jack Skilling of Chevy Chase on the 19th hole in the afternoon round. Skilling, who won his morning match over medalist George Jackson of Baltimore Country Club rallied from three holes down with four to play to square the match with Clemmens at the 18th. Clemmens won the match with a 10-foot par putt on the first extra hole.