Outstanding black professional and amateur golfers, plus some top-notch players from the Middle Atlantic PGA, are expected to match shots in the 26th annual Capital City Open tournament scheduled for the Langston public course, 24th Street and Benning Road NE, June 19-21.

In the past, such standout players as Calvin Peete, Lee Elder, Jim Thorpe, Chuck Thorpe and Bobby Stroble have competed in the tournament.

Friday's first day of play will be a best-ball event for amateurs only. Weekend play will feature a 36-hole professional tournament and a 36-hole amateur tournament.

The 54th annual Frank Emmet Schoolboy championship is scheduled for June 30-July 3 at Country Club of Fairfax. Jon Hurst of Woodbridge, the defending champion, and Fred Widicus of Annandale, 1985 winner, are entered . . . The ninth annual Jack Understein Memorial Adult-Junior will be held Tuesday, July 21, at Argyle. All proceeds from the event, sponsored by the junior golfers of Washington, will go to the Frank Emmet scholarship fund. Those unable to play are urged to make a donation. The adult may be man or woman, amateur or pro. Those interested in playing should call Bob Riley in Springfield . . . Three-time winner and defending champion Gill FitzHugh, playing his home Army Navy Country Club course, will be the man to beat in the Northern Virginia Amateur, June 25, 27, 28 . . . Poolesville head professional Cary Ferrell will hold a clinic Saturday, June 20, from 9:30 a.m. until 2:30 p.m. The $10 entry includes clinic, lunch, range balls and club rental (if needed). Youths who appear without clubs will be given one free club to keep.

The Prince George's Hospitals golf and tennis tournament to benefit both the Prince George's Hospital Center Shock Trauma Unit and Laurel-Beltsville Hospital Emergency Services will be Monday, July 27, at Lake Arbor. For more information, call Regina Schewe . . . The Lombardi Memorial golf and tennis outing, which has raised money for cancer research at Georgetown University, will be June 22 at Indian Spring . . . At Army Navy recently, Libby Kinnard shot net 60 to win the annual Steve Tobash Bowl; Judi Enright won low gross with a 75. The event celebrated 25 years that Tobash has been the professional at the Arlington club . . . Repeat winners of the Baltimore Colts NFL Alumni tournament were former Penn State receiver Scott Fitzkee, Steve Murphin, Bill Rueter, Fran Contino and Harry Pappas. Former Redskin Ron Saul and companions Dick Dickens, Otis Poole, Ray August and Rich Pickeral repeated as winners of the Redskins version. Winners from each NFL chapter will play in the Super Bowl of Golf, March 19, at Callaway Gardens (Ga.).

Former PGA Tour player and live-wire Dave Hill recently turned 50 and is playing on the Senior PGA Tour. Hill, who quit the regular tour seven years ago to become a farmer outside Detroit, was fined for calling the 1970 U.S. Open course, Hazeltine in Minnesota, a cow pasture. Others who recently turned 50 and may appear on the seniors tour are Tommy Aaron, Charles Coody, Al Geiberger and Bruce Devlin. Doing well on the seniors tour is former San Francisco 49ers quarterback John Brodie.