Even when Kevin Brown pitches well, he winds up with a loss. This time, he didn’t get much help from his teammates.

John Lackey combined with four relievers to shut down the all-or-nothing Yankees, and the Los Angeles Angels got RBI singles from Vladimir Guerrero and Darin Erstad in a 3-1 victory last night. Lackey improved to 2-5 lifetime against the Yankees.

The Angels took two of three at Yankee Stadium, assuring New York (9-13) of its first losing month since it was 11-17 in May 2003.

After Alex Rodriguez’s huge night in a 12-4 victory Tuesday, the Yankees managed just one run in each of the last two games and dropped their second consecutive series at home.

Brown (0-3) lost his sixth straight start dating to last season – but he was New York’s lone bright spot. He allowed three runs and eight hits in seven innings, retiring his final 11 batters. Yet Brown hasn’t won since August 28, 2004, in Toronto, and his six-game losing streak matches the longest of his career.

Lackey (2-1) lasted only 5 1/3 innings because he threw 111 pitches, but he was effective. He gave up only Hideki Matsui’s RBI double, then turned it over to Los Angeles’s outstanding bullpen.

Jake Woods, Brendan Donnelly, and Scot Shields combined for 2 2/3 scoreless innings before Francisco Rodriguez got three outs for his fifth save in six chances.

The Angels’ bullpen has allowed only one earned run in its last 39 2/3 innings.

The Yankees stranded 10 base runners.

Chone Figgins used his speed to spark a two-run third inning for the Angels. He singled and stole second, then took off for third on the next pitch as Guerrero bounced a perfectly placed RBI single past Rodriguez, who had vacated his position to cover the bag.

Garret Anderson followed with a double to right, and Gary Sheffield bobbled the ball before throwing to second base. But nobody was there – shortstop Derek Jeter had dashed to the right side to cut off a possible throw to the plate.

When Sheffield’s toss went rolling through the infield, Guerrero broke for home and scored easily as the crowd of 51,951 groaned at New York’s embarrassing mistake.

Erstad’s run-scoring single in the fourth made it 3-0. Matsui put the Yankees on the board with a two-out RBI double in the fifth.

Bubba Crosby started in center field for the Yankees to give Bernie Williams a rest and went 0-for-1 with a walk. Williams pinch-hit in the sixth and grounded out.

It was the Angels’ 100th victory at Yankee Stadium.