Mike Young hit reliever Aurelio Lopez's second pitch for a grand slam home run in the eighth inning tonight to break a 3-3 tie and give the Baltimore Orioles a 7-4 victory over the Detroit Tigers.

Young's two-out homer, his 13th, came after starter Jack Morris (17-10) loaded the bases on walks to Ken Singleton, pinch hitter Joe Nolan and Al Bumbry.

It was the first grand slam for Young, but the Orioles' sixth of the season and second in three games. Singleton hit one Saturday night.

Sammy Stewart (7-2), who relieved starter Storm Davis in the seventh inning, held off Detroit on four hits over the last three innings and was the winner.

"When we saw them change pitchers, Eddie (teammate Eddie Murray) told me that Aurelio Lopez likes to set you up with fast balls, then try to get you with his slider," Young said. "He was right on the money. Lopez threw me two fast balls. The ball I hit was on the inside of the plate."

Lopez said he had few choices. "Sure, I wanted to keep the ball away from him, but you don't have much room to work with in that situation," he said.

Morris gave up nine hits and was charged with six runs. Doubles by Murray and John Lowenstein gave Baltimore a 3-2 lead in the sixth before Darrell Evans' homer in the home half made it 3-3.

The Orioles scored twice in the second inning. Singleton led off with a triple and scored on a wild pitch by Morris. Rich Dauer singled, took third on Rick Dempsey's double and scored on a ground out by Bumbry.

Detroit made it 2-2 in the fourth. Lance Parrish and Evans walked and Ruppert Jones singled to score Parrish. John Grubb beat out an infield hit to load the bases and Davis walked Larry Herndon on a 3-2 pitch to force in the second run.