Right-hander Mike Parrott, property of the Orioles for five years, tonight pitched the Seattle Mariners to their first victory over Baltimore in Memorial Stadium, a 5-4 rain-delayed decision.

The Mariners, who had lost 14 previous contests here, were led by center fielder Ruppert Jones. He doubled twice and drove in three runs to spoil the season pitching debut of lately recalled Dave Ford.

Oriole reliever Sammy Stewart suffered his fourth loss against six wins as the Bird's seven-game winning streak snapped. Their AL East lead was reduced to four games over the Boston Red Sox.

"J just like beating the Orioles," said Parrott, who pitched six innings. It's been three years and this is our first win here. It feels good. I know a lot of guys in that (Oriole) clubhouse."

"It's about time we won something here," said Jones. "I don't know wha kind of pitches I hit for those doubles. It was raining too hard and I had to concentrate just to see at all."

Oriole rookie Ford, who joined the team Tuesday from Rochester, was nicked for his first major league earned run in the first inning on two walks and a Dan Meyer RBI centerfield single.

Ford made two appearances last season, against Chicago and Cleveland, pitching 15 scoreless innings.

The record for most consecutive scoreless innings at the beginning of a career by an Oriole is 18 by Tom Phoebus. The major league high is 22.

The Orioles got to Parrott and his 3.66 earned run average for three runs in the third on A1 Bumbry's tworun single over Bruce Bochete's outstretched first-base mitt.

Designated hitter pat Kelly had led off with an opposite-field single and Rick Dempsey dribbled a base hit off second baseman Larry Milbourne's glove. Kiko Garcia grounded into a force play and stole second before Bumbry continued his assault on Mariner pitching.

He has hit .409 (18 for 44) against Seattle this season, going one for four tonight.

Bumbry moved to third on an infield ground out and scored on Parrott's wild pitch, giving the Birds a 3-1 lead.

Jones doubled in a run in the fifth. He doubled home two more in the seventh off Stewart to put Seattle, ahead, 4-3. Bochte scored Jones with a single, his 71st RBI and tonight's game-winner.

The Orioles ruined a golden opportunity to score in the second, baserunning blunders by Eddie Murray and John Lowenstein taking them out of a would-be rally.

Most of the 17,425 braved a one hour tree-minute rain delay and looked on as Doug DeCinces sent Parrott to the dry clubhouse for the evening with a left-field double to open the Oriole seventh.

Kelly singled off reliever Byron McLaughlin and broke up an attempted double play, upending Milbourne with a hard slide as DeCinces scored Baltimore's fourth run.

The Birds rallied in the ninth, trying for their 19th late-game victory of the season. But DeCinces' second double, a force play with a walk to pinch hitter Terry Crowley came to naught.