Jim Dalrymple, general manager of the D.C. Armory Board, which runs RFK Stadium, said yesterday it is good "to know the feelings" of Washington Redskins owner Jack Kent Cooke, who said last week he would like a domed stadium for his NFL team seating 70,000-75,000 fans.

"The area deserves a far better facility {for football} than it presently has," said Cooke, who said he has not looked for a new site, nor would he move the team from the area. In 1960, the Redskins signed a 30-year lease at now 55,000-seat RFK Stadium. The team receives no revenue from concessions and parking. It pays rental of 10 percent of gross ticket sales (12 percent for playoffs), but makes money from program and novelty sales.

"This is a start," Dalrymple said of Cooke's statements. "They're {the Redskins} looking to improve their facilities."

D.C. Mayor Marion Barry said last night on radio station WHUR that he had not had any personal conversation with Cooke and, until he does, he does not care to give a detailed response. Barry did say it is "unlikely" any new stadium will be built.

Fairfax County Executive J. Hamilton Lambert said of his interest in talking to the Redskins: "I'm not sure the county would be willing to discuss the issue."

John Schofield, deputy planning director for Prince William County, said he would love to discuss the issue.

Sidney Kramer, Montgomery County executive, said most sports organizations seeking a new facility look to the local jurisdictions "to make major concessions in underwriting the effort." He said his county is "not in a position" to do that . . .

The Los Angeles Raiders reportedly have made a legal claim for nearly $18.5 million in damages from the Los Angeles Memorial Coliseum Commission for alleged breach of promises made to the team when it moved from Oakland to Los Angeles.

If the claim is paid, it would deprive the Coliseum Commission of almost all the damages it hopes to receive in its suit against the NFL for impeding the Raiders' move from Oakland in the early 1980s. That judgment has been entered and the U.S. Supreme Court is considering whether to hear a final appeal.

The letter was mailed the same day that Al Davis, the Raiders' managing general partner, formally announced his intention of moving the team to nearby Irwindale and building a stadium there . . .

The head of the National Association of Collegiate Directors of Athletics has asked NFL Commissioner Pete Rozelle to postpone Friday's supplemental draft because it "attacks the integrity of our educational mission."

Carl Miller, NACDA's president and the athletic director at University of the Pacific, wrote Rozelle to request a meeting to discuss ramifications of the draft he scheduled to allow NFL teams to select former Ohio State wide receiver Cris Carter and former Pitt running back Charles Gladman, who lost their NCAA eligibility for dealing with agents.

Miller said the supplemental draft would effectively dissolve longstanding agreements and understandings and "will have a devastating effect on our continuing effort to allow student-athletes the benefit of full educational experiences." . . .

The New York Giants, who have had four players stricken by cancer within eight years, should consider testing the area around Giants Stadium in East Rutherford, N.J., players union officials said.

Mark Murphy, vice president of the NFL Players Association on a visit to the Giants' training camp in Pleasantville, N.Y., also said the union would like its next collective bargaining agreement to include a study of mortality rates at all NFL stadiums.

Meanwhile, Jon F. Hanson, chairman of the New Jersey Sports and Exposition Authority said the stadium area is environmentally safe and called reports implying the contrary "highly irresponsible . . . totally without foundation." . . .

Gene Upshaw, the NFLPA executive director, canceled a speech scheduled today at the National Press Club on the league's labor talks because NBC technicians and cameramen were planning to picket the event.

TENNIS

Top seed Steffi Graf has tooth trouble and will not play in the United Jersey Bank Classic in Mahwah, N.J., this week, officials said. It would have been her last tuneup meet before the U.S. Open, Sept. 1-13 in New York.

Graf had dental surgery in Florida Thursday and Friday and had more surgery set for last night, said tournament spokesman Jim Fuhse. He said Helena Sukova will become No. 1 seed, Zina Garrison No. 2.

The dental work on the world's No. 1 ranked player couldn't be finished last week because of an infection, he said . . .

Davis Cup doubles player Ken Flach and 15-year-old Michael Chang are among eight players receiving wild-card entry from the U.S. Tennis Association into the main draw of men's singles in the U.S. Open.

Chang, of La Costa, Calif., won the USTA Boys 18 national championship this summer in Kalamazoo, Mich. He and Flach of Sebring, Fla., are joined as wild cards by Pan American Games runner-up Al Parker, Shelby Cannon, Rich Leach, Joey Rive, Todd Nelson and Andrew Burrow.