The D.C. Baseball Commission will take its case for expansion to several major league owners in the next few weeks in hopes one or more will champion its cause. At its regular monthly meeting yesterday, the commission also voted to publish a monthly newsletter to keep the 15,000 season-ticket investors informed about progress toward getting a team and to solicit new ticket buyers.

Commission consultant Morris Siegel began the lobbying by meeting with Philadelphia Phillies President Bill Giles last week and reported:

" Giles' words were, 'Nobody wants it that I know of.' He said there were too many sick teams and expansion was not imminent."

Siegel said he believes Washington's best hope may be a possible sale of the San Francisco Giants. After making his report, Siegel, who earns a reported $50,000 a year, told the commission that Chairman Frank Smith had asked him to serve without pay.

"I've declined that offer," Siegel said, and left the meeting.

Smith said later he wanted to keep Siegel as a consultant and would be willing to pay him.

"There is some concern about the salary, though," Smith said. "But I'm going to do what I can to get him back. He has been too valuable to us." . . .

A one-day blitz to sell tickets for one of baseball's least-watched teams brought the Pittsburgh Pirates $136,455, equal to about 17,000 box seats and exceeding a $100,000 goal.

To date, the team has sold about 275,000 advance tickets, about the same number as this time last year, when total attendance was 735,900 . . .

Hall of Famer Charles (Red) Ruffing, 81, has died in suburban Cleveland. Four times a 20-game winner for world champion New York Yankees teams, 1936-39, he had a 273-225 career record plus 7-2 in World Series play.

Ruffing endured a 39-96 stand with weak Red Sox clubs, 1925-30, then was traded by Boston to the Yankees. He is second on their all-time list behind Whitey Ford in games and innings pitched, strikeouts, wins (231) and World Series wins. And Ruffing, who made the Hall of Fame in 1967, helped himself at bat with 36 home runs and eight .300 seasons.

The right-handed Ruffing meant to be an outfielder until he lost four toes on his left foot in a mining accident.