Woodmont's Gary Marlowe, who qualified for the U.S. Open starting Thursday at Pebble Beach (Calif.), plans to turn pro in September. After playing in the Kemper at Congressional, where he shot two 77s and missed the cut, Marlowe said: "I learned that I can hit the ball as good or better than most of the pros." . . .

The USGA received a record 5,255 entries for the U.S. Open before the field was whittled to 153. This week's 8 3/4 hours of ABC-TV's package will include 18-hole coverage Saturday starting at 3:30 and Sunday at 4.

Sonny Jurgensen is celebrity chairman for the "Longest Day of Golf," a golf marathon at several northern Virginia clubs this month. Benefits will go to the American Heart Association. In a similar event recently in Colorado, Rifle Creek head pro Steve Ladonne shot 717 strokes for 181 holes, seven under par.

The $3,000-added Middle Atlantic PGA Boy Scouts of America Pro-Am will be held Monday at Tantallon . . . Marty West of Columbia will defend his title in the Maryland Amateur starting Thursday at Rolling Road in Catonsville . . . Sally Voss was unable to get away from her medical school studies on the West Coast and will not defend her championship in the Women's District Golf Association Championship at Lakewood, which will run Monday through Friday. Jane Abood will compete . . . Ed Galinsky and June Egan made holes in one on Montgomery Village's 16th hole within five minutes of each other.