Chuck Knoblauch and Derek Jeter started the game with consecutive home runs and Hideki Irabu struck out 12 tonight to push the New York Yankees to a 13-3 victory over the Boston Red Sox.

Knoblauch, who missed the previous two games after complaining of dizziness, was 5 for 6 with four RBI. Jorge Posada had two doubles and a two-run homer, and Scott Brosius also had three hits for New York.

The back-to-back homers to lead off the game were the first for the Yankees since April 27, 1955, when Hank Bauer and Andy Carey did it against the Chicago White Sox.

Irabu (8-3) settled down after a shaky first inning to win his seventh consecutive decision. He allowed six hits and a walk in his second complete game of the season, and at one point struck out five in a row.

Mark Portugal (6-8) lasted just 1 1/3 innings, giving up six runs on six hits in his shortest outing of the year. Three of the runs were unearned; Boston committed two errors in the four-run second inning.

The Red Sox tied it at 2 in the first on John Valentin's home run and an RBI double by Troy O'Leary that left fielder Shane Spencer caught, then dropped as he crashed into the wall.