Juan Berenguer and Willie Hernandez combined to pitch a three-hitter and Cal Ripken made a rare error at shortstop to let in the only run as the Detroit Tigers defeated the visiting Baltimore Orioles, 1-0, last night.

Detroit, which won for only the second time in eight games, increased its lead in the American League East to 8 1/2 games over Toronto. The Blue Jays lost to the New York Yankees, 4-3.

Berenguer (8-9) allowed only a second-inning leadoff double to Eddie Murray -- which extended his hitting streak to 18 games -- and a single to left by Ken Singleton in the fifth.

Hernandez came on with one out in the eighth after Berenguer walked his third batter of the game. Hernandez promptly hit pinch hitter Gary Roenicke, but then struck out pinch hitter Benny Ayala and got Mike Young to fly out. He pitched a scoreless ninth, giving up one hit, to earn his 28th save.

Mike Flanagan (11-12) allowed only six hits, but two came in the first inning to contribute to Baltimore's fifth loss in 18 games.

Alan Trammell doubled down the left field line with one out and Barbaro Garbey hit a ball up the middle. Ripken reached it, whirled and threw low to first, the ball skipping past Murray and allowing Trammell to score.

Of Berenguer, Ripken said, "I don't know how anybody hits him. I think I only have one career hit off him. He throws so hard, and then when he starts getting his breaking ball over, he's really tough."