Rookie Jack Howell hit two homers, one a grand slam, to enable the California Angels to beat the Baltimore Orioles, 7-3, last night in Anaheim, Calif.

The Angels got only four hits, but Howell hit the first grand slam of his career on his first at bat, in the second inning against Scott McGregor. Then, on his second at bat leading off the fifth against Ken Dixon, he hit his fourth homer this season.

He went into the game with one hit in his last 21 at bats. He batted against Nate Snell with the bases loaded in the eighth inning but grounded out.

Mike Witt (12-7) won the 10th of his last 12 decisions to increase the Angels' lead in the AL West to 2 1/2 games over the Kansas City Royals. He allowed three runs on 10 hits and six walks in six innings. Donnie Moore pitched the last three innings to earn his 23rd save.

California scored five times in the second off McGregor (10-12). Bobby Grich led off with the first of three walks and took third on George Hendricks' bloop double to right field.

With one out, McGregor walked Gary Pettis to load the bases, then walked Bob Boone to force in a run. Howell hit a 2-2 pitch into the right field seats for a 5-1 lead.

Howell's second home run gave the Angels a 6-3 lead.

Baltimore had taken a 1-0 lead in the second when John Shelby singled with one out and scored on Rich Dauer's double to right.