Rick Dempsey's one-out sacrifice fly in the 10th inning last night scored pinch runner Eddie Murray and gave the Baltimore Orioles a 5-4 victory over the Mariners in Seattle.

Ken Singleton drew a one-out walk off Gaylord Perry (3-3) and Murray ran for him. John Lowenstein singled to extend his hitting streak to 13 games, with Murray advancing to third. Mike Stanton replaced Perry, and Dempsey, who had entered the game in the eighth, lifted a fly to medium right field.

Tippy Martinez (1-3) yielded one hit in three innings and Tim Stoddard pitched the 10th inning for his first save.

Seattle tied it, 4-4, in the eighth. Bruce Bochte led off with a walk. Lenny Randle came in to pinch run, stole second and went to third on Martinez's wild pitch. With the infield in, Todd Cruz grounded to shortstop Bob Bonner, who threw the ball into right field for an error, allowing Randle to score.

Al Bumbry led off the seventh with a single and Rich Dauer hit his third homer of the season to give Baltimore a 4-3 lead.

Oriole starter Mike Flanagan gave up only one hit in five innings but Bobby Brown singled to lead off the sixth. Manny Castillo walked and Bochte doubled to tie the game, 2-2. Al Cowens singled for a 3-2 lead.

The Orioles took a 1-0 lead in the fourth on Singleton's homer, and got a run in the fifth when Bumbry walked and Dan Ford doubled.

Perry struck out 11, marking the 41st time in his career he has struck out 10 or more in a game. He has 3,382 strikeouts, 126 shy of Walter Johnson's all-time record.