NEW YORK (AP) _ With a leadoff homer by Bernie Williams in the 10th inning, the AL championship series opened with one of the oldest stories in baseball: the New York Yankees overtaking the Boston Red Sox.

Williams hit the game-winning shot off Rod Beck, and Scott Brosius hit a two-run homer, triple and single to lead the Yankees to a 4-3 victory Wednesday night.

In the first postseason game ever between the traditional rivals, the Yankees won their 11th straight postseason game, and once against tortured their neighbors from New England.

Boston took a 2-0 lead just seven pitches into the game on a run-scoring throwing error by shortstop Derek Jeter and Brian Daubach's RBI single. Jose Offerman's RBI infield single made it a 3-0 lead in the second against Orlando ``El Duque'' Hernandez, who had allowed just one run in 20 career postseason innings coming in.

Brosius hit a two-run homer in the bottom half against surprise starter Kent Mercker, and Jeter tied it in the seventh with an RBI single off Derek Lowe.

Williams then opened the 11th by sending an 0-1 pitch to straightaway center field, At first, Darren Lewis thought he had a chance at it, but the ball kept sailing and went over the 408-foot sign.

``I was due,'' Williams said. ``I was just able to get a good pitch and turn on it. I was just looking for a pitch out over the plate. I definitely didn't want to pull out on the ball.''