DALLAS, DEC. 7 -- The Baltimore Orioles made the first trade of the winter meetings late tonight when they acquired veteran right-hander Doug Sisk for two minor league pitchers. The Orioles will send the New York Mets left-hander Blaine Beatty, 23, and another minor league pitcher to be named later.

Sisk was the second pitcher the Orioles acquired today, having gotten Jose Bautista in the major league draft earlier in the day.

Sisk, 30, was 3-1 with three saves and a 3.46 ERA for the Mets last season. He has been a reliever for most of his career, and the Orioles say he could start or pitch in relief for them.

"He'll get more work with us than he did with the Mets," Orioles General Manager Roland Hemond said. "He could end up being our stopper."

The Sisk trade was Hemond's first with the Orioles, but apparently not the last. Late tonight, he appeared to be moving toward two more.

One would involve shipping righty Ken Dixon to Seattle in exchange for right-hander Mike Morgan, a trade that would be a swap of players who had bad seasons.

The other one was more intriguing, and would involve sending outfielder Mike Young to Detroit for outfielder Scott Lusader, a fast defensive player and outstanding young prospect. The Orioles rate Lusader highly enough that he would probably go to spring training as their starting left fielder.

Although he pitched only at Class AA Jackson last season, Hemond said Bautista "looks like he has the poise and polish to make it in the big leagues."

Bautista, 23, was selected off the Mets' Tidewater roster. At Jackson, he was 10-5 with a 3.24 ERA; he threw two complete games in 25 starts.Rose Makes It Official

Pete Rose ended weeks of speculation this afternoon by making his retirement as a player official. Rose, 46, appeared to make the announcement only grudgingly, and in a one-hour meeting with reporters, several times emphasized that he wanted no part of teary goodbye ceremonies.

"I don't feel the need to make an announcement," he said. "It's not like they're going to take my uniform away. I'm not going to catch the ball or throw the ball or hit the ball anymore. You can call it retirement. But I don't want to make it a big deal. I don't want to make a circus out of it."

Rose, the Cincinnati Reds' manager, didn't appear in a 1987 game. His last career at-bat was September 1986, when he struck out on three Goose Gossage fastballs. He leaves with 4,256 hits, more than any other player in history.

He also has played in more games (3,562), collected more singles (3,215) and had more 200-hit seasons (10) than any other player.

Rose said he didn't want a Julius Erving-style farewell tour because "I don't like home plate ceremonies and stuff like that . . . I think if you have Pete Rose night in Cincinnati, you won't have enough room for all the people I'd like to thank. And besides, if my day drew 500 people fewer than Johnny Bench's day, I'd be mad." . . .

In a surprising move, the Mariners have entered serious negotiations to sign free-agent reliever Dave Righetti . . . The Yankees appear close to obtaining outfielder Dave Parker from Cincinnati for outfielders Phil Lombardi and Henry Cotton and pitcher Bill Fulton . . .

The Montreal Expos' re-signing of free agent Dennis Martinez now appears in danger, and Cleveland and Baltimore have moved back into the picture. Baltimore attorney Ron Shapiro, Martinez's agent, said other teams have shown so much interest that he and the pitcher need time to re-assess the situation . . . The Expos took one of the nine players drafted today, left-handed knuckleballer Rich Sauveur of Falls Church. He had a 13-6 year at Pittsburgh's AA Harrisburg club . . .

The Orioles hired former catcher Johnny Oates as their manager at Class AAA Rochester . . .

The Phillies and Mariners are waiting on Seattle owner George Argyros to arrive and approve a Phil Bradley-for-Glenn Wilson and Mike Jackson deal. That's no sure thing. Two years ago, Argyros killed a Jim Presley-for-Storm Davis deal at the last minute.