Baltimore's Scott McGregor never has had much luck against the Milwaukee Brewers. In the Orioles' 2-1, 11-inning loss to the Brewers tonight, McGregor's tough times continued. Rick Manning's 11th-inning home run gave the Milwaukee Brewers a 2-1 victory over the Baltimore Orioles at County Stadium tonight.

The Orioles wasted a fine performance by starter Scott McGregor, who came into the game with a 5.63 career ERA against the Brewers. McGregor pitched 10 innings, allowing only one run on five hits and one walk. Tim Stoddard, who replaced MacGregor at the start of the 11th inning, gave up the one-out home run to Manning and was the loser.

The Orioles failed to take advantage of a scoring opportunity in the first inning. With two outs, Cal Ripken Jr. walked on four pitches. The next batter, Eddie Murray, hit a bloop double down the left field line, which left fielder Mark Brouhard bobbled. But Ripken slipped rounding third and had to scramble back to the bag. John Lowenstein grounded out to first to end the inning.

In the second inning, the Orioles had runners on first and second with one out, but again could not score. Joe Nolan singled and Leo Hernandez walked on four pitches before Rich Dauer flied to left and Al Bumbry grounded into a fielder's choice.

McGregor, meanwhile, cruised through the first six innings. He gave up only two hits--two-out singles to Robin Yount in the first inning and Charlie Moore in the second. The only other Milwaukee base runner through six innings was Moore, who walked in the fifth.

Moose Haas, the Brewers' starter, was just as sharp. After getting out of the two early jams, he allowed only one hit in the next three innings, a single by Nolan in the fourth.

In the sixth, the Orioles finally broke the scoreless tie. Ripken led off with a single and Murray followed with a single. Lowenstein hit a ground ball to second baseman Jim Gantner and Murray was forced out at second, Ripken moving to third. Ripken then scored on a ground out by Ken Singleton.

Ted Simmons got Milwaukee's third hit in the seventh inning when he singled with one out. But McGregor got Brouhard and Moore to fly out.

The Orioles mounted a threat in the eighth when Ripken led off with a single. Murray forced Ripken at second, Lowenstein singled and, after Singleton flied out, Nolan walked to load the bases. Haas got behind pinch hitter Jim Dwyer, three balls and no strikes, before striking him out to get out of the inning.

Baltimore tried again in the ninth when Bumbry singled with one out, stole second and went to third on Dan Ford's fly out. Ripken, however, grounded out to end the inning.

The Brewers came back to tie the score in the ninth. With two out, Cecil Cooper doubled and scored on a single by Simmons. Brouhard lined out to Ripken and the game went into extra innings.